PRODUCT DATA
® U.S. Registered Trademark
Copyright © 1997 Honeywell Inc. • All Rights Reserved
VS8510/VS8520
HI/LOW
option
VS8510/VS8520
Millivolt Combination Gas Control
APPLICATION
The VS8510 and VS8520, millivolt combination gas
controls, are low capacity compact size millivolt operated
gas valves, see Figure 1. They are designed for use in
small gas appliances burning either LP or natural gas.
Primary appliance applications include gas fireplaces,
fireplace inserts, log sets, free standing stoves, wall
furnaces, and room space
The VS8510 and VS8520 millivolt gas valves are approved
in accordance with IAS (AGA and CGA).
FEATURES
• For use with 750mV thermopile generator.
• VS8510 has operator and power unit powered by
750mV thermopile generator.
• VS8520 has operator powered by 750mV thermopile
and power unit powered by 30mV thermocouple.
• Vented and vent free models.
• Available with standard or high/low regulators.
• Capacity rated at 60,000 BTUH at 1” wc pressure drop.
Maximum regulation capacity is 100 BTUH and
minimum regulated capacity is 10 BTUH. All capacities
are with side inlet.
• Adjustable servo regulator maintains almost constant
gas outlet pressure over a wide range of gas supply
pressures.
• Models available with 0˚F to 175˚F (-18˚C to 79˚C),
-40˚F to 175˚F (-40˚C to 79˚C), 0˚F to 225˚F (-18˚C to
107˚C).
• Multiple inlet and output main gas connections with
NPT or BSP.
• Multiple pilot outlet and thermocouple locations.
• European style inlet and outlet pressure taps.
• Programmed lighting sequence with safe lighting pilot
system and safety shutoff.
• Fine mesh inlet screen included optional outlet screen.
• Mutliple mounting holes can be mounted at any angle
between 0 and 90 degrees from the top upright position
(knob on top).
• Latching device interlock eliminates involuntary re-
ignition of the main burner.
• Snap-open opening characteristics.
• Compact.
• ECO (Energy Cut-Off) option.
Contents
Application ........................................................................
1
Features ...........................................................................
1
Specifications ...................................................................
2
Ordering Information ........................................................
2
Installation ........................................................................
5
Startup and Checkout ......................................................
7
Service .............................................................................
12
Accessories ......................................................................
12
68-0203
This is a legacy product document supported by
Resideo. This product is no longer manufactured.