Raypak XTherm 1005A Installation And Operation Manual page 50

Manifold Gas Pressure
Model
(High Fire Values) in W.C.
No.
Natural Gas
1005A -4.6
1505A -7.1
2005A -2.6
Table Y. XTherm Manifold Pressure Settings
CAUTION: Special manifold and air settings may be
A
required.
6.5.3. 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 heaters.
Local Heat/DHW/EMS demands must be present for
burner operation.
Number
Field
SYS System Pump relay turns on.
DHW DHW Pump relay turns on.
PMP 1 System and Heater Pump relays turn on.
CWP CWP Proportional output
Boil 1 Ignite Heater Burner.
Max 1 Ramp Heater to Max Fire and hold.
Min 1 Hold Heater at Min Fire.
Table Z. 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 heater outlet temperature reaches the PIM Hi-
Limit, the heater will be ramped down to keep the
temperature in a safe range.
• Press of the Up button from Heater Max will End the
User Test function.
• CWP MUST be enabled (VERSA DIP #3) VALVE must
be functioning during USER TEST.
NOTE: If USER TEST is performed with Cold Water
Protection enabled (VERSA DIP 3 = ON), allow valve or VS
pump test sequence to complete uninterrupted or a fault
condition may occur.
50
Propane Gas
-6.6
-8.0
-9.3
Output Action
6.5.4. Safety Inspection
1. Check all thermostats and high limit settings.
2. During the following safety checks leave manometers
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 XTherm
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 (if provided). (For
proper adjustment, use the attached manometers, if
available, to set pressure. The scales on the switch
are approximate only.) Low gas pressure switch (if
provided) must be set at 3.0" WC for natural gas and
propane gas.
8. Make sure that the high gas pressure switch is set to
3.0" WC for both natural gas and propane gas.
6.5.5. Finishing
Record all data on the "Start-up Checklist" located at the
back of this manual.
Disconnect the manometers and reconnect the cap on
the fan pressure tee and reinsert the sealing screws into
the bleedle valves.
Start-up is complete and the heater should be operating
properly.
6.5.6. Follow-Up
Safety checks must be recorded as performed.
Turn heater on. After main burner ignition:
1. Check manometer for proper readings.
2. Cycle heater several times and re-check readings.
3. Remove all manometers and replace caps and
screws.
4. Check for gas leaks one more time.
5. To prepare for possible "limp-along" operation (if
communication is ever lost between the VERSA and
the PIM), set the operator Set Point potentiometer
on the PIM (See Figure 31) to the desired target
setpoint.
6.5.7. Leak Test Procedure: Dual-Seat
Gas Valve
Proper leak testing requires three pressure test points in
the gas train. Remove the upper front panel to access the
gas valve for this test. See Figure 56.
Test point A is a bleedle valve located upstream of the
combination gas valve on the supply manifold.