Scope of work

Known

• Two SCE service accounts at this address, two meters. Which panel each meter feeds is not documented.
• Main panel in the interior electrical room, overhead service. Inspection report records the service as "200 / 400"; the actual main breaker rating is unconfirmed.
• Zinsco breakers present. Flagged at inspection, replacement waived by the insurer. State in writing whether you will work in this panel.
• Seven rooftop AC units on dedicated circuits from a roof panel. Two are named on file. AC Pro PKHP-M-0601BB, 5-ton package heat pump, 1-phase 230 V. Carrier 48ESNA4809030, gas/electric packaged unit (48 prefix), 220 V stated; a 2025 replacement bid was never signed, so confirm it is in service. The rest are unread.
• Sauna heater is the only 3-phase equipment on site (contractor statement 2026-09-04). Nameplate kW unconfirmed, estimate 6 to 12 kW.
• Tesla Wall Connector, 60 A circuit (inferred from the 11.3 kW charging peak; confirm at the breaker). TRC caps it at 12 A (2.8 kW) inside the unit. That is a setting anyone with the sticker password can undo, so the circuit also gets a contactor and sheds first. Do not change the cap.
• Uncontrolled floor (LED video wall, light rig, kitchen, gear): estimated 6 to 24 kW, never measured. The two-week Eyedro read decides whether the LED wall feed also gets a contactor.
• Peak history: 27.2 kW max on the main meter, every window over 20 kW was EV charging at 48 A. Second meter never above 14.4 kW.

Confirm on site; same-day email if anything differs from the order

• TRC orders the model Brayden picks from the meter photos before your visit. If your read disagrees, email Taji and Greg the same day, before it ships.
• Service phase at each meter: single-phase (split) or 3-phase. Decides the controller model: 9388BA (single-phase, 40 or 80 kW full scale by CT set) or 9388B3 (3-phase, 50 to 200 kW by CT set). Wye or Delta if 3-phase; a 3-phase service with a 240 V outlet points at high-leg Delta. Record the full-scale value Brayden ships.
• Which meter and panel feed each of the nine loads, written down and emailed the same day. Two SCE accounts, two meters, no map exists. The controller's CTs go on the mains of the SCE service account for the site (the account number is on the meter face). That is the account with the demand problem; only loads fed from that meter get relays.
• Fit the Eyedro EB6-EW-E3 (TRC supplies it) on those same mains on this visit, so two weeks of data exist before install day.
• Main breaker rating and CT size to match (200 A minimum; 400 A if the service is 400).
• Each AC: thermostat low-voltage Y wire accessible at the condenser, or line-voltage control that needs a contactor instead.
• Sauna heater: nameplate kW, volts, phase. Contactor sized to nameplate, 50 A 3-pole minimum.
• Route for 24 V control wiring to the roof. If the pull is impractical, Brayden's WireLynx powerline option replaces it; say so in the quote.

Eyedro EB6-EW-E3 and the meter-to-load map, on the quote visit

• TRC supplies the meter and its sensors. Mount in the panel, sensors on the service conductors the controller CTs will use, Wi-Fi or Ethernet to the building network. Confirm the app shows live kW before leaving.
• Write down which meter and panel feed each of the ten loads and email it to Taji and Greg the same day.
• This is the independent check on the controller, the two-week floor measurement, and the evidence TRC files with SCE.

Mount the 9388B at the main service panel

• Enclosure: NEMA 1 18 x 12 x 4 in indoors, or NEMA 3R 12 x 10 x 4 in if outdoors. 120 VAC supply on its own breaker, labeled.
• CTs on every service conductor of the mains of the SCE service account for the site (the account number is on the meter face). That is the account with the demand problem; only loads fed from that meter get relays. Orientation per the manual; the display must read whole-building kW.
• Location within reach of Taji for the weekly display check. Lockable.

One pilot relay per rooftop AC, seven total

• 3 A pilot relay, 24 VAC coil, wired in series with the thermostat Y (compressor call) at each condenser. Blower stays on when shed; compressor and outdoor fan stop.
• Relay contacts closed when the controller is unpowered or failed, so a controller fault never locks out cooling.
• Label each relay with the room name from the roof panel directory, its shed order and its 9388B priority number (table below).

Contactor on the Tesla Wall Connector circuit, shed first

• 2-pole definite-purpose contactor rated for the Tesla circuit, in the feed to the Wall Connector, driven by a controller output. Contactor coil held energized through the controller's N/C output, fed from a control transformer on a breaker separate from the controller supply, so controller power off leaves the contactor closed.
• No compressor timer needed; a paused charge resumes when the controller restores it. The 12 A software cap stays in place as well.
• If the two-week Eyedro read shows the uncontrolled floor above about 13 kW, add a contactor on the LED wall feed at shed order 3. Quote it as an option.

Contactor on the sauna heater

• Line-voltage thermostat, no 24 V wire: the controller output drives a 3-pole definite-purpose contactor in the heater feed. Sized to nameplate, 50 A minimum.
• Contactor coil held energized through the controller's N/C output, fed from a control transformer on a breaker separate from the controller supply, so controller power off leaves the contactor closed. Sauna stays usable; the controller only opens it for minutes at a time.

Program, test, lock, document

The controller numbers priorities backwards from this list: 1 is the most important load (shed last), so the Tesla is entered as priority 10.

If the LED wall is not fitted, close the gap: Tesla 9, sauna 8, ACs 7 to 1. The manual requires it: "Make sure the list is sequential so that there are no missing priority numbers in the order" (Identify Each Load's Priority).

• Display reads limit 18.0 (or 17.6, the step below 18, if the full scale is 80 kW), interval 15 min, dC 1. Photo taken.
• Controller kW and Eyedro kW agree within 1 kW with the building running.
• Forced shed test: with two or more ACs running, lower the limit temporarily until the controller sheds. The first AC in the shed order stops within 4 s per shed step, Eyedro kW drops, the blower keeps running. Limit returned to the value in line 1 and re-photographed.
• Forced Tesla shed: car charging, controller sheds it first; Wall Connector drops out, Eyedro falls by the charge, resumes on restore.
• Forced sauna shed: sauna heating, controller sheds it second; heater returns after the minimum off time.
• Power-fail test: controller breaker off, every AC, the sauna and the Tesla still run normally (relays and contactors fail closed; both contactor coils must stay energized with the controller breaker off, and if they drop, the coil supply is wrong). Breaker back on.
• Alarm sounds when tested.
• Every relay labeled with room, shed order and 9388B priority; panel directory updated; box locked; keys to Taji.
• Permit final signed or inspection scheduled, copy emailed to Taji with Greg in cc.
• Tesla Wall Connector cap untouched, still 12 A.

• Quotes in writing with CSLB license number. TRC verifies the number at cslb.ca.gov before booking.
• Zinsco panel: your written answer on whether you will work in it, and if not, what you propose, before the quote is accepted.
• Permit pulled under your license. Santa Monica Building and Safety.
• Change orders only by email, Greg in cc, before the work. No verbal adds.
• HVAC tech on site for relay terminations. Electricians do not open condenser control compartments without him.
• Fail-closed relays and contactor, always. A dead controller must never mean no cooling.
• Nothing else is switched. Only the listed loads: Tesla, sauna, seven ACs, and the LED wall only if the Eyedro data calls for it. No outlets, lighting or gear circuits.
• Photos of the finished panel, each relay, the contactor, and the display go to Taji and Greg the same day.