4
APPLICATION INSTRUCTIONS
With a given size orifi ce spud (or orifi ce setting where adjustable) the gas mani-
fold pressure determines the fi ring rate in cubic feet of gas per hour. For quick, con-
venient calculation of fi ring rate or orifi ce size, use BACHARACH GAS SERVICE
CALCULATOR. This is a simple type of slide rule designed specifi cally for gas
service personnel or installer with simple, easy to follow instructions on the face
of the calculator. For every type or mixture of combustible gases, it is necessary
to operate burner in a given manifold pressure range for proper burner operation.
Consult local gas utility, service engineer or burner manufacturer for recommended
limits of gas manifold pressure.
MAINTENANCE INSTRUCTIONS
REVERSING SCALE
(0017-7002 only) (Figure 3)
Front of Scale, as shipped from factory, reads pressure in inches of water. Rear
of Scale of 0017-7002 (only) is also graduated in ounces per square inch. When
only occasionally reading in ounces per square inch, reverse Scale.
Close Valves (10-11). Remove Screw (19). Press Retaining Ring (20-20) out
of retaining grooves. Lift off Front Cover (21). Remove Scale Knob (15), Scale
Clamp Cover (22), and Scale Clamp Screw. Reverse Scale and reassemble.
ADDING INDICATING FLUID
(Figure 3)
Always use Bacharach Fluid, 0017-0025. Use of other fl uids will result in
error in reading pressure.
NOTE:
Water will not operate in either Manometer Part# 0017-7002 or
0007-7013
(0017-7016
unfi lled) due to action of Blow Over-Seals
(23).
Remove left hand Valve (10) and open Valve (11). Slide Scale to bottom of
Gauge. Add suffi cient Bacharach Fluid, 0017-0025, with dropper provided, through
Valve opening to raise fl uid level in both legs to Fill Line on Scale (with Gauge in
vertical position).
