Media, PA

I performed a comprehensive heat tune-up on a 21-year-old natural gas boiler. I inspected the flues and chimney, finding minimal debris. The heat exchanger and burners were clean, and I cleaned the burner compartment. The pilot assembly showed a blue flame with an orange tip, indicating good performance. I also checked the hydraulic components, including the air eliminator, feed valves, expansion tank, and circulator, all of which were in good condition. Wiring controls and components were verified, and the boiler has surge protection. I provided estimates for a low-level carbon monoxide detector and a WiFi+Audible water sensor. Combustion and draft tests passed, and the system is operating well. The homeowner renewed their service plan today.

I gathered comprehensive information about the existing system, including pictures and load size. After discussing with Joe, I conducted a load calculation to determine if the house could support an 82,000 BTU boiler or two 54,000 BTU boilers. The electrical setup includes 1 AWG wire and a 150-amp breaker. Each boiler requires 66.7 amps to run, with the breaker's minimum capacity at 80 amps and maximum at 100 amps. This analysis ensures the system can safely accommodate the boilers.

Previously I thought the air handler in room 117 (where I cleared aux pan and drain line last week) served all (3) rooms that the teacher informed me of. Each classroom has its own AHU (BCU) (fan/coil unit) Room 116 BCU #3: Checked filter, belt and drain pan Room 116 (BCU #3) drain is clear and filter is in good condition. Thermostat is satisfied. Room temperature 71° Room 117 BCU# 4 : is the classroom I worked in on Friday. Drain pan remains dry and thermostat is satisfied. Room temperature 71° Room 119 BCU# 6: had a deteached belt (B33) Room temperature is 71° there is a demand for cooling for 64°. I let Mike and Steve know this. Replaced B33 belt provided by Williamson warehouse. Filter ok. There are a couple threaded plugs (cleanouts) in the 1 1/4” condensate drain line if needed. *there was one door open of AHU#1 mechanical room. Mike advised me to close it. All (3) systems RMs 116, 117, 119 operating well at this time.

There are (3) classrooms that have been struggling to cool according to one person on site Rooms 119, 117, 116 Equipment is chiller air handler. 16x25x1 filter ok Found the air handler in 117 above drop ceiling. Auxiliary pan was full of water, Blower motor is running. Siphoned and used wet vac to remove water from auxiliary pan. There is a float style pan switch but it is unclear how it interacts with BAS system. Brushed out top at available clean out. Temperature split is 12° 74-62. Room temperature dropped 2° after I cleared pan and float switch reset. I told Steve to monitor the BAS and room temperatures. If cooling performance issues persist, it is likely that the chiller itself is the culprit.

Upon arrival, tested system and system would ramp up in increments and full capacity at around 30 minutes with supply temperature around 53 to 55 and return at 71. I double checked all settings and operations adjusted static pressure to highest settings. Customer states that the system will randomly work OK and then not work . I informed a customer to text me every day with a picture of the thermostat settings and temperatures. I have to send all information to Ferguson Mitsubishi and all data. They said they will review it and reach back out. They have no answers at this current time, I was there for two hours and the temperature did not drop from 70°.

School was closed for holiday, Need to reschedule

Building was locked. Attempted to contact Steve Povey and Mike. School is closed for Labor Day weekend. We will reschedule

Equipment is 5 Ton Communicating Carrier heat pump rooftop unit, (4) 16x16x2 filters should be replaced soon. Issue is no cooling. (3PH Power supply 206V) (25VAC present between R and GND on J1) Called Pierce Phelps tech support and we went through all safeties and any possible issue with equipment itself. There are no open safeties and there is 12V DC present at the RNET terminals (1 and 4) The issue is the communicating thermostat via the BAS network is not making the demand for cooling. I used the J1 terminal on the board to verify this. Issue is with the BAS system itself. Informed Steve and Mike of this they are going to contact the BAS company they use iview. Left estimate for filter replacement. System is inoperable until BAS issue is resolved.

Completed AC tune ups: (2) 5:1 Minisplit systems total of (10) indoor heads. Branch boxes in tunnels under building. Installed in June 2019; systems are 7 years old Cleaned all washable filters Measured temperature splits Verified refrigerant diagnostics Flushed drain lines. Indoor housings and blower wheels are dirty provided estimate to clean (8) indoor heads. There are (2) units that have horizontal air swing with clicking sound. I sprayed the armatures with white lithium grease. Requires complete disassembly of indoor head controls. We will have to access tunnels to turn off branch boxes if we were to ever clean indoor heads or replace horizontal air swings (any work on indoor heads will require this) There is no part for horizontal air swing or motor that I could find on an exploded parts diagram. This would be a very time consuming repair, (1.5 hours each) If clocking sounds persists and breaking does not resolve issue we will need to research part and provide estimate to r

Completed QA for 18,000 BTU 1:1 Minisplit install. Snack Bar. Inspected all aspects of install: mechanical, wiring, piping, configuration of power monitor. Power monitor under-voltage: 190; over-voltage 226; Checked performance of system and refrigerant diagnostic: 107 psi 2.5°SH Good; temperature split 22° (69-47) Install passes QA inspection.