Gasmac GARAGEMAC GM-40S, Installation & Operating Instructions Manual

Page: 21 / 44

21
TERMINATION CAPS (cont.)
Adhere to all current local codes and/or ANSIZ223.1 / CSA.B149.1 latest editions for all
venting requirement and practices.
When venting with a manufactured vent system, vent termination caps must be of a
design that prevents direct wind infiltration into the venting system. If wind is permitted
to infiltrate into the venting system, static pressure may build and trip the appliance
blocked flue sensor, resulting in nuisance appliance shutdowns.
GENERAL EXHAUST VENT INSTALLATION REQUIREMENTS
- All vent pipe used with a slip fit connection must be mechanically secured by
means of 3 stainless sheet metal steel screws at 120 degree intervals.
- All vent pipe used that does not have a manufactured gasket/sealing
mechanism must be sealed with a suitably rated high temperature RTV type
silicone at all joints, in addition to sealing any screw penetrations.
- If a seam is present in a single wall duct material, orient the seam to the top
side of the duct, and apply high temperature RTV silicone and/or suitable
metal tape as required to ensure that the seam is gas tight.
- All venting used must be adequately supported to prevent sagging.
- When the vent pipe passes through a cold or unheated area where the
ambient temperature is likely to produce condensation of the flue gases, the
vent pipe must be insulated with a suitable insulation material that is
approved and specified by the insulation manufacturer to withstand
temperatures up to 450 F (232 C).
- Blockages of air intake and exhaust vent caps by snow and/or ice must be
prevented.
- A maximum of 3 90 degree elbows may be installed in any vertical exhaust
vent system.
- Maintain a downward slope on the venting material of no more than 1/4” per
foot (6.3 mm) from the start of the vent system to the vent terminal. Do not
apply downward slope to the appliance itself, it must be installed to be
horizontally level.
COMMON EXHAUST VENTING OF APPLIANCES
A maximum of two units may be exhausted on a common 6” vent with the use of the
factory supplied AC1120 4”x 4”x 6” (10 x 10 x 15 cm) exhaust T, for both side wall and
roof venting. A suitably rated and certified high temperature exhaust cap must be used
on the end of the 6” exhaust vent.
CAUTION : Units with common exhaust must be jointly controlled.
The addition of the AC1120 exhaust T incorporates a 90’ degree bend into the venting
of each unit, deducting 5’ (1.5 m) from the allowable total of exhaust/intake venting for
each commonly vented unit.