with the blower suction within the tolerances spec-

 

CAUTION: Special manifold and air settings may

 

 

 

 

 

ified in Table T, contact the factory. The reference

 

be required.

 

 

amp draw reading may help to indicate if there is

 

 

 

a problem with the system or if blower adjustment

 

Finishing

 

is required.

 

 

 

 

 

 

 

 

 

NOTE: Most commercially available amp probes

 

 

1.

Record all data on the “Start-up Checklist” located

 

 

 

 

are not accurate enough and/or are not shielded well

 

 

 

 

at the back of this manual.

 

enough to read accurately in the heater

 

 

2.

Disconnect the manometers and reconnect the

 

environment. Blower amp draw readings are for

 

 

 

reference only.

 

 

 

 

 

 

 

 

 

cap on the fan pressure switch tee and reinsert the

 

 

 

 

 

 

 

 

 

 

 

sealing screws into the bleedle valves.

Manifold Check

 

 

 

 

 

 

 

 

 

 

 

 

3.

Start-up is complete and the heater should be

1. Check manifold gas pressure at the gas valve out-

 

 

operating properly.

 

Safety Inspection

 

let pressure tap (connection “D” in Fig. 48). This

 

 

pressure should read per the values in Table X for

1.

Check all thermostats and high limit settings.

 

natural and propane gas.

 

 

 

 

 

2. If the pressure reading differs by more than ± 0.2

2.

During the following safety checks leave manome-

 

in. WC, STOP – Call the factory for directions

 

 

ters hooked up, check and record.

 

on what to do next!

 

 

 

 

 

3.

If other gas-fired appliances in the room are on the

 

Model No.

 

Air Pressure

 

Setting

 

 

 

same gas main, check all pressures on the MVB

 

 

 

 

 

 

 

 

Setting (in. WC)

 

Tolerance

 

 

 

with all other equipment running.

 

504

 

-2.3

 

± 0.2 in. WC

 

4.

Check thermostats for ON-OFF operation.

 

754

 

-2.9

 

± 0.2 in. WC

 

 

1104

 

-4.0

 

± 0.2 in. WC

 

5.

Check high limits for ON-OFF operation.

 

1504

 

-4.0

 

± 0.2 in. WC

 

6.

While in operation, check flow switch operation.

 

2004

 

-4.1

 

± 0.2 in. WC

 

 

 

 

 

 

 

 

 

 

7.

Check the low gas pressure switch (if provided).

 

Table V:

 

MVB Air Pressure

 

Settings

 

 

 

 

 

 

Setting

 

 

 

 

 

(For proper adjustment, use the attached

 

Model No.

 

Amp Draw

 

 

 

 

 

 

manometers, if available, to set pressure. The

 

 

 

Tolerance

 

 

 

 

 

scales on the switch are approximate only.) Low

 

504

1.9

+0.0/-0.2

 

 

 

 

 

 

 

 

 

 

 

gas pressure switch (if provided) must be set at

 

754

2.9

+0.0/-0.2

 

 

 

 

 

3.0 in. WC for natural gas and propane gas.

 

1104

5.5

+0.0/-0.2

 

 

 

8.

Make sure that the high gas pressure switch (op-

 

1504

8.1

+0.0/-0.2

 

 

 

 

2004

13.0

+0.0/-0.5

 

 

 

 

 

tional) is set to 3.0 in. WC for both natural gas and

 

 

 

 

 

 

 

 

 

 

 

propane gas.

 

Table W: MVB Amp Draw (Reference Only)

 

 

 

 

Follow-Up

 

 

 

Manifold Gas Pressure Setting

 

 

 

 

 

 

 

Model No.

 

High Fire Values (in. WC)

 

 

Safety checks must be recorded as performed.

 

 

 

Natural Gas

 

Propane Gas

 

 

Turn heater on. After main burner ignition:

 

504

 

-0.1

 

-0.1

 

 

 

1.

Check manometer for proper readings.

 

754

 

-0.4

 

-0.1

 

 

 

 

1104

 

-1.0

 

-0.2

 

 

 

2.

Cycle heater several times and re-check readings.

 

1504

 

-2.4

 

-0.6

 

 

 

3.

Remove all manometers and replace caps and

 

2004

 

-1.0

 

-0.5

 

 

 

 

 

screws.

 

Table X: MVB Manifold Pressure Settings

4.

Check for gas leaks one more time.

 

 

 

 

44

 

 

 

 

 

 

 

 

Page 44
Image 44
Raypak 5042004 operating instructions Finishing, Manifold Check, Safety Inspection, Follow-Up

5042004 specifications

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