Rheem Raypak Hi Delta P902C Installation & Operating Instructions Manual page 55

Safety Inspection
1. Check all thermostats and high limit settings.
2. During the following safety checks leave manome-
ters hooked up, check and record.
3. If other gas-fired appliances in the room are on the
same gas main, check all pressures on the Hi
Delta with all other equipment running.
4. Check thermostats for ON-OFF operation.
5. Check high limits for ON-OFF operation.
6. While in operation, check flow switch operation.
7. Check the low gas pressure switch. (For proper
adjustment, use the attached manometers, if
available, to set pressure. The scales on the
switch are approximate only.) Low gas pressure
switch must be set at 5.0 in. WC for natural gas
and 10.0 in. WC for propane gas.
8. Make sure that the high gas pressure switch
(Sales order option S-2) is set to 5.0 in. WC for
natural gas and 11.5 in. WC for propane gas.
Follow-Up
Safety checks must be recorded as performed.
Turn heater on. After main burner ignition:
1. Check manometer for proper reading.
2. Cycle heater several times and re-check readings.
3. Remove all manometers and replace caps and
screws.
4. Replace all gas pressure caps.
5. Check for gas leaks one more time.
User Test
Set DIP switch #1 on the VERSA IC control to "ON".
Set USER TEST = ON in the 'ToolBox' Menu to start
the user test function.
• USER TEST is displayed in the Title Field.
• UP keystrokes are used to advance through the
user test.
• The Boil MIN/MAX steps for burner operation are
only run for enabled boilers.
Local Heat/DHW/EMS demands must be present
•
for burner operation.
Number
Output Action
Field
SYS System Pump relay turns on.
DHW DHW Pump relay turns on.
PMP 1 System and Boiler Pump relays turn on.
CWP CWP proportional output
Boil 1 Ignite Boiler Burner.
Min 1 Hold Boiler at Min Fire.
Max 1 Ramp Boiler to Max Fire and hold.
Table T: User Test Fields
• On the first press of the Up button, the test step is
held and "HOLD" is flashed at 1Hz.
• On the second press of the Up button, the test
step is incremented.
• If boiler outlet temperature reaches the PIM Hi-
Limit, the boiler will be ramped down to keep the
temperature in a safe range.
• Press of the Up button from Boiler Max will End
the User Test function.
• When CWP is enabled (VERSA DIP #3) VALV will
become available during USER TEST.
Leak Test Procedure: Dual-Seat Gas
Valves
Proper leak testing requires three pressure test points
in the gas train. Refer to Fig. 53. The numbers on the
diagram refer to the steps below:
Test point A is upstream of the automatic gas valve. On
the first automatic valve, this is a bleedle valve. On the
other valves, this is a plugged port. The bleedle valve
on the first valve may be used for all the other valves
as well.
Test point B is a bleedle valve located between the two
automatic gas valve seats.
Test point C is located downstream of both automatic
gas valve seats and upstream of the manual valve. On
the manual valve, this is a bleedle valve. Identical
readings will be found at the plugged port labeled as
Alternate C.
These tests are to be conducted with the electrical
power to the heater turned off.
1. Manually close the downstream leak test valve.
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