HTP PHR199-55C - Manual (Page 57)

57
LP- 325 REV. 3.21.14
E. FILL AND TEST WATER SYSTEM
Ensure the appliance is full of water before firing the burner. Failure to do so will damage the appliance. Such damage IS NOT covered
by warranty, and could result in property damage, serious personal injury, or death.
1. Fill system only after ensuring the water meets the requirements of this manual.
2. Close manual and automatic air vents and appliance drain valve.
3. Fill to correct system pressure. Correct pressure will vary with each application.
a. Typical cold water fill pressure for a residential system is 12 psi.
b. Pressure will rise when appliance is turned on and system water temperature increases. Operating pressure must never
exceed 25 psig.
4. At initial fill and during appliance startup and testing, check system thoroughly for any leaks. Repair all leaks before proceeding
further.
5. The system may have residual substances that could affect water chemistry. After the system has been filled and leak tested, verify
water pH and chlorine concentrations are acceptable.
F. PURGE AIR FROM THE HYDRONIC SYSTEM (PIONEER AND VERSA-FLAME)
IMPORTANT! While commissioning the system, the air vent on top of the appliance must remain fully open to allow the appliance to
properly fill. Failure to keep the air vent open could lead to improper appliance and system operation.
1. Connect a hose to the purge valve and route hose to an area where water can drain and be seen.
2. Close the appliance or system isolation valve between the purge valve and fill connection to the system.
3. Close zone isolation valves.
4. Open quick-fill valve on cold water makeup line.
5. Open purge valve.
6. One zone at a time, open the isolation valves. Allow water to run through the zone, pushing out the air. Run until no noticeable air
flow is present. Close the zone isolation valves and proceed with the next zone. Follow this procedure until all zones are purged.
7. Refill to correct pressure.
G. PURGE AIR FROM DHW SYSTEM (VERSA-FLAME)
The power must remain off until the potable water side of the appliance is fully purged of air. To purge the DHW system, turn on the
cold water feed and open a faucet at the highest point of the system. Observe filling of the brazed plate heat exchanger and inspect for
any leaks in the system which may occur and need to be repaired. Shut off faucet once all evidence of air is purged from the water
stream (water is flowing freely).
H. CHECK THERMOSTAT CIRCUIT(S)
1. Disconnect the two external wires connected to the appliance thermostat terminals (low voltage terminal strip).
2. Connect a voltmeter across these two incoming wires with power applied to thermostat circuits. Close each thermostat, zone valve
and relay in the external circuit one at a time and check the voltmeter reading across the incoming wires.
3. There should NEVER be a voltage reading.
4. If a voltage does occur under any condition, check and correct the external wiring. (This is a common problem when using 3-wire
zone valves).
5. Once the external thermostat circuit wiring is checked and corrected if necessary, reconnect the external thermostat circuit wires to
appliance low voltage terminal strip.
I. FINAL CHECKS BEFORE STARTING APPLIANCE
1. Read Startup Procedures within this manual for proper steps to start appliance. (See Startup Report to record steps for future
reference).