Thomas & Betts RZ-NA 441-OMS installation manual Operating/Maintenance/Service Instructions

C E R T I F I E D

INDOOR OR OUTDOOR, GAS, DIRECT-FIRED, MAKEUP AIR/

HEATING SYSTEMS

(Specifications subject to change without notice.)

Operation/Maintenance/Service

Form RZ-NA 441-OMS

Applies to: Model Series DV

TABLE OF CONTENTS

Page		Page				Page
MAINTENANCE		8. Temperature Limit Safety Controls ...	5		•Manifold Arrangements	8
SECTION	2-4	•Manual Reset Limit Control	5		•Gas Pressure Switches	8
Configuration	2	•Emergency Cut Off Limit Control ..	6	12.	Outside Air Ambient Cutoff	8
		9. Air Pressure Switches	6
Maintenance Schedule	2			13.	Door Switch	9
		•Low Air Flow Switch	6
1A. Blower Bearings	3			14.	Inlet Air Controls	9
		•High Air Flow Switch	6
1B. Blower Belts	3				•Air Flow Dampers	9
		•Bypass Damper (Optional) Air
2. Filters	3				•Damper Motor	9
		Flow Switches	6
3. Manifold Gas Pressure	3				•Potentiometer	9
		10. Ignition System	6
4. Air Pressure	4				•Pressure Null Switch	9
		11. Gas Train Including Direct-Fired
5. Circuit Indicator Board (check lights) 4					•Photohelic Pressure Switch	10
		Burner, Gas Control Systems,
				15.	Dirty Filter Switch	10
6. Main Burner and Pilot Assembly	...... 4	Manifold Arrangements and Gas
OPERATION/SERVICE		Pressure Switches	7	16.	Photoelectric Smoke Detector	10
		•Direct-Fired Burner	7	17.	Firestat	10
SECTION	5-15
		•Makeup Air Gas Control Systems ..	7	18.	Freezestat	10
Controls - Location	5	•Electronic Modulation Gas Control		19. Troubleshooting		11
7. Electronic Circuit Board with		Options AG30, AG31, AG32,			Chart 1 - General Troubleshooting
		AG33, AG35, AG36	7		Guide (Check the diagnostic lights on
Diagnostic Lights	5
		•Electronic Modulation Gas Control			the circuit board)
		Option AG37	7	Index		12

References: Installation Manual, Form RZ 441

Replacement Parts Manual, Form RZ 741

FOR YOUR SAFETY

WARNING: The use and storage of gasoline or other flammable vapors and liquids in the vicinity of this appliance is hazardous.

If you smell gas:

1.Open windows.

2.Don't touch electrical switches.

3.Extinguish any open flame.

4.Immediately call your gas supplier.

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury or death. Read the installation, operation, and maintenance instructions thoroughly before installing or servicing this equipment.

KEEP THIS BOOKLET

FOR MAINTENANCE AND SERVICE REFERENCE.

Operating/Maintenance/Service Instructions

The information in this manual applies to Model Series DV, di- rect-fired heating/makeup air systems. As with any gas burning equipment, regular maintenance procedures are required to en- sure continued safety, reliability and efficiency of the installa- tion.

If service is required, this system should be serviced only by a qualified service person. Service information in this booklet is intended as a guideline for a qualified gas-fired equipment ser- vice person.

Mfg No. 161442 Page 1