Honeywell VS820 User Manual

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APPLICATION
These gas controls combine a Lite-Rite manual
gas cock, safety shutoff Pilotstat assembly,
millivoltage automatic valve operator, and optional
gas pressure regulator. They require the use of a
750 mv Powerpile generator (thermopile). The
generator, heated by the pilot burner flame, pro-
vides the electrical energy to operate the combina-
tion gas control.
A millivoltage thermostat with suitable ac-
cessory controls completes the automatic control
system for the heating appliance.
Models equipped with the standard pressure
regulator are identified by the suffix letter “A“
WS820A.j Models without pressure regulator
carry the suffix letter “6” (VS820B). Suffix letter
“C” (VS82OC) identifies models having step
opening type regulators.
Pressure regulators and operator are standardiz-
ed and interchangeable on all models in the two
capacity ranges - 225 and 335 cubic feet per
hour.
PRESSURE REGULATOR ADJUSTMENT
LITE-RITE GAS COCK
(BENEATH COVER SCREW)
MANUAL KNOB \ \
*PILOT GAS OUTLET.
PRESSURE TAPPING
DIRECTLY BENEATH
PlLOTSTAi
POWER UNIT
\
PILOT FLOW ADJ. SCREW
(BENEATH COVER SCREW)
NOTE: 24 VOLT VALVE OPERATOR ILLUSTRATED
120 VOLT MODELS FEATURE TWO 36 INCH (914 mm) LEADS
WITH A TERMINAL COVER FOR CONDUIT CONNECTION.
MANUAL
GAS COCK
\
STANDARD
OUTLET
I,
INLET STRAIGHT
THROUGH
-4&.-W
A FLATS (VERTICAL) FOR l-7/8 INCH WRENCH
,a,,.
Fig. 2 - Piping pattern and dimensions (in inches) of
VS820.
SIZE PIPE TAPPINGS
225,000
I
II2
I
II2
335,000
I
314
I
314
PREPARE AND INSTALL PIPE
1. Use new, properly reamed pipe free from chips.
2. Do not thread pipe too far. Valve distortion or
malfunction may result from excess pipe within
control.
LENGTH OF STANDARD PIPE THREADS (inches)
4
Fig. 1 - Top view A model. Pressure regulator for “C”
model illustrated at right. (Blank cover plate
(Part No. 392782) is available to convert an
“A” model to a “B” model without pressure
regulator.)
3. Apply moderate amount of good quality dope to
pipe only, leaving two end threads bare. If LP gas in-
stallation, use compound resistant to action of li-
quified petroleum gases.
PROPER PIPING PRACTICE
2 IMPERFECT CONTROL USE MODERATE
THREAD PIPE RIGHT LENGTH
LEAVE 2 END
THREADS BARE
5-83
*TRADEMARK
PRINTED IN U.S.A.
Form Number 9!%10 0248-l
Residential Division
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1 2 3 4

Summary of Contents

Page 1 - APPLICATION

APPLICATION These gas controls combine a Lite-Rite manual gas cock, safety shutoff Pilotstat assembly, millivoltage automatic valve oper

Page 2 - In POWERPILE

4. Install drip leg in gas supply pipe. (Fig. 31 DROP I I PIPED DROP PIPED t GAS SUPPLY A ALL BENDS IN METALLIC TUBING SHOULD BE SMOO

Page 3 - 3/S TO 112 INCH

to either main or pilot burner. PILOT, which permits gas to flow to pilot burner only (when gas cock knob is held depressed or w

Page 4 - Honeywell Limited

PILOT GOES OUT WHEN LITE-RITE KNOB IS RELEASED 1. Check pilot flame adjustment. See page 3. 2. Check the Powerpile generator connect

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