FLOW DIRECTION
ARROW POINTS UP
(REAR VIEW)
MAKE SURE MOTOR IS
LOCATED ON RIGHT SIDE
CLOSED
OPEN
FLOW DIRECTION
MOUNT VENT DAMPER
OVER DRAFT DIVERTER
INSTALL SWITCH IN
OPENING
ON DRAFT DIVERTER
7
STEP 5: INSTALLING/TESTING
GAS PIPING
Connect the gas piping from the meter to the boiler
using a pipe size which will result in a pressure drop of
less than 0.3" W.C. for natural gas or 0.5" W.C. for
propane. See Figure 2.7 for the appropriate gas pipe
sizing and example.
Good piping practices should be followed at all times.
See Figure 2.6 for a typical gas piping arrangement. All
piping must be supported by hangers, not by the boiler
or its accessories.
Install a full-sized sediment trap at the low point in gas
line upstream of gas valve. Install a non-restrictive lubri-
cated plug valve in the gas line close to the boiler. Install
a ground joint union at the gas valve inlet to allow for
servicing. Check local codes and utilities for any special
requirements and procedures.
Pipe joint compound (pipe dope) must be compatible
with the fuel (natural gas or propane) being used.
FIGURE 2.6: TYPICAL GAS PIPING
FIGURE 2.5A: VENTING
ADDITIONAL CHIMNEY REQUIREMENTS
Chimney condition is of paramount importance for a
safe and efficient boiler installation. All installations must
include a chimney inspection by a qualified individual or
agency. Chimney construction materials must be com-
patible with the fuel being used (see Figure 2.5A).
Particular attention should be paid on all oil-to-gas con-
versions. Soot may have accumulated in chimney and/or
degraded chimney liner. Most utilities require complete
chimney cleaning. Others may require installation of new
liner, spill switches or other chimney upgrades. Check
with local utility for required safety precautions.
DANGER: A chimney which does not meet modern
safety standards will result in a fire or deadly car-
bon monoxide poisoning of the building residents.
FIGURE 2.5: ATTACHING VENT DAMPER TO DRAFT
DIVERTER & FLUE PIPE
Summary of Contents for VSB2-605
Page 23: ...23 NOTES...
