Valve Proving System - Honeywell 7800 Series Installation Instructions Manual

RM7898A 7800 SERIES VALVE PROVING PRIMARY RELAY MODULES
Test Relay
Numbe Module Jumper
r Model
1 All None
2 All None
3 All 4-5
4 All
5 All 5-10*
6 All 5-8*
7 All 5-9*
8 All 5-21*
9 All 5-3
Final All
*Replace jumper wire with ammeter and verify loads to component ratings.

VALVE PROVING SYSTEM

The Valve Proving System feature provides a systematic way
of testing the valve seat integrity to assure the valves are in
the closed state whenever the sequence of operation
requires them to be closed. It is designed to detect a leak
greater than 0.1% of the burner input capacity. For example,
a 10 million Btu/hr natural gas-fueled burner would have a
fuel input capacity of approximately 1,000 ft
greater than 0.1% of 1,000 ft
will be detected with the Valve Proving System. Smaller
leaks will not be detected.
32-00209-03
Table 6. Static Checkout.
Test
Voltmete
s r
5-L2 Line voltage at terminal 5.
6-L2 or Line voltage at terminal 6 or 17.
17-L2 For Valve Proving.
7-L2 1. Burner motor (fan or blower)
starts.
2. Line voltage at terminal 7
within 10 seconds.
20-L2 Line voltage at Terminal 20
— 1. Ignition spark (if ignition
transformer is connected to
terminal 10).
— 1. Ignition spark (if ignition
transformer is connected
to terminal 8).
2. Automatic pilot valve
opens
(if connected to terminal
8).
NOTE: Refer to wiring diagram
— Automatic fuel valve(s) open(s).
If using direct spark ignition,
check first stage fuel valve(s)
instead of pilot valve.
— Automatic second stage main
fuel valve(s) open(s).
— Alarm (if used) turns on.
CAUTION
Equipment Damage Hazard.
Can cause equipment damage.
After completing these tests, open master switch and remove all test jumpers from
subbase terminals. Also remove bypass jumpers, if used, from low fuel pressure limits.
3
/hr. A leak rate
3 3
/hr or 1 ft /hr in either valve
Normal Operation
of system being tested.
At commissioning time, the Valve Proving System may be
scheduled to occur at one of five different times: Never,
Before, After, Both, and Split.
Never—Device default as received: in this case Valve
Proving does not occur.
Before—Valve Proving occurs concurrent with Pre-
Purge.
After—Valve Proving occurs after the Run state before
the internal Safety Relay dropout state and concurrent
with Post Purge (if configured).
Both—Valve Proving occurs at both times Before and
After noted above.
12
If Operation is Abnormal,
Check Items Listed Below
1. Master switch.
2. Power connected to master switch.
3. Overload protection (fuse, circuit
breaker, etc.) has not opened power
line.
1. Limits.
2. Burner controller.
1. Burner motor circuit.
a. Manual switch of burner motor.
b. Burner motor power supply,
overload
protection and starter.
c. Burner motor.
Pre-Ignition Interlocks.
1. Watch for spark or listen for buzz.
a. Ignition electrodes are clean.
b. Ignition transformer is okay.
1. Watch for spark or listen for buzz.
2. Listen for click or feel head of valve for
activation.
a. Actuator if used.
b. Pilot valve.
Same as test 6. If using direct spark
ignition, check first stage fuel valve(s)
instead of pilot valve.
1. Listen for and observe operation of
second stage main fuel valve(s) and
actuator(s).
2. Valve(s) and actuator(s).
1. Alarm.