Rheem Generator Systems, GEN12AD-V installation manual Engine Adjustment

5.	Install 15 Amp fuse in control panel.	3.	Ensure that the 15 Amp fuse is installed.
6.	Set generator’s system switch to AUTO.	4.	Set the generator’s main circuit breaker ON.
7.	Push and hold MANUAL OVER-RIDEbutton on control	5. Set the generator’s system switch to AUTO.
	panel for about six seconds. Engine will start.
		6. Push MANUAL OVER-RIDEon control panel. When the
	When the generator is started for the very first time, it
			engine starts, allow it to warm up for five minutes.
	will require that air in the gaseous fuel lines be purged.
	This may take a few minutes.	7.	Normal no load frequency is 62.0 to 62.5 Hz. If
8.	Listen for unusual noises, vibration or other indications		adjustment is needed at no load, remove unit side
	of abnormal operation. Check for oil leaks while		panels. Using needle nose pliers, bend spring anchor
	engine runs.
			tang (B) slowly up or down until frequency is 62.0 to
9.	Let engine warm up for about five minutes to allow
			62.5 Hz.
	internal temperatures to stabilize.
10.	Check generator output at load side of circuit breaker.
	Voltage should be 239-262 Volts, frequency should be
	62.0 - 62.5 Hz.
	If either parameter is outside these ranges, perform
	Engine Adjustment described later in this section.
11.	Check generator output between one generator
	connection lug and neutral lug, then between other
	generator connection lug and neutral lug. In both cases,
	voltage reading should be between 119-131 Volts.

DO NOT proceed until you are certain that generator AC

voltage and frequency are correct and within the stated

limits. To obtain the proper generator frequency, see

B

Engine Adjustment.

REPRODUCTION2 through 7.

A

A

12. Push and hold MANUAL OVER-RIDEbutton on control

panel again until engine stops.

8.

Turn utility servi

n to transfer switch OFF.

ce discon

13. Reinstall circuit breaker enclosure cover.

After a short

transfer switch will connect

time delay

to gener

Engine Adjustment

tor.

9.

Load

generator t

o full load.

There are regional variances in the composition of gaseous

10.

After load sta

ilizes, frequency should be

fuel. Each home generator unit leaves t

he

factory set for

abo

ve

5

7.0 Hz.

NG operation. If the generator output

voltag

or frequency

11. I

f frequ

ency is below 57.0 Hz, bend spring anchor tang

measured during Initial Start-Upis outside the listed ranges,

unt

frequency is above 57.0 Hz.

the combustibility of the gas u

pplied at

the in

stall

ation

1

2. Turn service disconnect to transfer switch ON. Transfer

site may be substantially

the

uel used at

ferent from

the factory.

NOT

switch will connect to utility power after five minutes.

13.

Push and hold MANUAL OVER-RIDEon control panel

To adjust the engine for this differe

ce, proceed

as

follows

.

until engine stops.

1. Remove four screws (A) that

cure

contro

l box fron

to enclosure to expose unit’s circuit

FORbreaker

.

14.

After the engine has stopped:

t

*G BO BEKVTUNFOU XBT NBEF JO TUFQ  SFQFBU TUFQT

t

*G BO BEKVTUNFOU XBT OPU NBEF JO TUFQ  QSPDFFE

to step 15.

SYSTEM

FAULT CODES

MANUAL

OVER-RIDE

SET

EXERCISE

If no load frequency falls out of the no load range shown in step 7 after full load adjustment is made, contact an authorized service center.

15. Reinstall circuit breaker enclosure cover.

A

A

2.Connect an accurate frequency meter to line side of generator’s main circuit breaker.

27