Honeywell VS8420 - User Manual

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INSTALLATION INSTRUCTIONS
69-1165—3
VS8420
Millivolt Gas Valve
APPLICATION
The VS8420 Millivolt Gas Valve is compact and has a
60,000 Btuh capacity (1 in. pressure drop for straight-
through configuration). The design makes it ideal for
fireplace and space heating applications.
SPECIFICATIONS
Main Gas Connection: Valve: 3/8 in. NPT thread.
Pilot Gas Connection and Flow:
Connection Size: 7/16-24 UNS.
Flow: 1700 Btuh at 4.0 in. wc pressure drop.
Thermocouple and Pilot Threads: Metric and UNS.
Ambient Temperature Range:
0°F to 175°F (-18°C to 79°C).
Option for 225°F (107°C).
Pressure Regulation (Standard Regulator):
Servo regulator with adjustable outlet pressure.
Natural Gas: 3.5 in. wc, typical.
LP: 11 in. wc, typical.
Regulator Adjustments (Standard Regulator):
Natural Gas: 3 in. to 5 in. field adjustable.
LP: 8 in. to 12 in. field adjustable.
Voltage: VS8420: 750 mV operator, 30 mV
t
h
ermocouple.
Approvals:
International Approval Services (IAS) Certificate:
C2
030022.
European Community (CE) Certificate: Applied for.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
th
e product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
te
chnician.
4. After installation is complete, check out product
operation as provided in these instructions.
WARNING
Oxygen Depletion Hazard.
Can cause injury or death due to
as
phyxiation.
Use only vented gas valve models on vented
appliances. Use only unvented gas valve models
on unvented appliances.
WARNING
Fire or Explosion Hazard.
Can cause property damage, severe injury or
deat
h.
Follow these instructions exactly:
1. Turn off gas supply at the appliance service
v
alve before starting installation, and perform a
Gas Leak Test after the installation is
complete.
2. Always install the sediment trap in the gas
sup
ply line to prevent contamination of the gas
valve.
3. Do not force the gas valve control knob. Use
only
your hand to turn the control knob. If the
knob does not operate by hand, the valve
should be replaced by a qualified service
technician.
69-1165.fm Page 1 Wednesday, June 22, 2005 12:33 PM
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Honeywell VS8420 Specifications