Raypak 5042004 Start-Up, Check Power Supply, Attach Manometers to Measure Pressures

Check Power Supply

With multi-meter at incoming power, check voltage between:

Hot - Common (≈120 VAC)

Hot - Ground (≈120 VAC) Common - Ground (< 1 VAC)

WARNING: If Common - Ground is > 1 VAC,

STOP: Contact electrician to correct ground failure. Failure to do this may burn out 120V-24V transformer, or may cause other safety control damage or failure.

Attach Manometers to Measure Pressures

1.Turn off main gas valve.

2.Attach (1) 12” scale manometer to an upstream bleedle valve on the gas supply pipe to the heater (Measure point “A” in Fig. 48).

3.Attach (1) 24” scale manometer to the manifold pressure tap located on the elbow downstream of the valve (Measure point “D” in Fig. 48).

4.Attach (1) 12” scale manometer near the fan-prov- ing switch. Pull black cap from air pressure switch tee and connect the manometer. NOTE: Retain caps for reinstallation later.

3. If the gas pressure is greater than 14.0 in. WC, turn off the main gas shut-off valve, upstream of the heater.

Start-Up

NOTE: The values in Tables V, W and X represent the conditions when the heater is at full firing rate at sea level.

NOTE: Pressure and combustion data are provided with the heater.

1.Turn power on.

2.Turn on the heater, wait approximately 15 seconds after the blower starts, and the igniter should start to glow (observable through the observation port located at the front, bottom of the heater). Look into the sight glass located at the bottom of the front panel to check igniter operation. Gas valve should open in 45-60 seconds.

3.The heater ignites at 50% of full rate (as indicated on the LCD display of the temperature control located in the upper right of the front panel).

4.If the burner fails to light on the first trial, it will try for ignition up to three times before going into lock- out with the standard ignition module. If the heater is equipped with the optional single-try ignition module, it will go into lockout.

5.Wait until the controller indicates 100% on the fir- ing rate display screen (approximately 30 seconds).

Blower Check

			TO BURNER	1.	Check blower suction using the manometer
GAS	A	B			attached to the fan pressure switch tee, with the
					heater firing at 100% input. The reading should be
		C	D		as noted in Table V for both natural and propane
	Fig. 48: Gas Pressure Measurement Locations				gas.
				2.	FOR REFERENCE ONLY: Measure the blower
Check Gas Supply Pressure					amp draw with the heater firing at 100% input and
					compare the measured value to the values in
1. Slowly turn on main gas shut-off valve.					Table U. The amp draw is measured with a clamp-
					on type amp probe clamped to the 14 AWG black
2. Read the gas supply pressure from the manome-					power wire going into the blower.
ter; minimum supply pressure for natural gas is 4.0				3.	When firing at 100%, the desired heater combus-
in. WC, recommended supply is 7.0 in. WC, mini-
mum supply pressure for propane gas is 4.0 in.					tion CO2 is between 8.5 and 9.0% for natural gas
WC, recommended supply is 11.0 in. WC (dynam-					and 9.5 and 10.0% for propane with CO less than
ic readings, full fire input).				43	100 ppm. If this combustion cannot be achieved