Harsco Industrial MACH C1500GG Installation & Owner's Manual page 16

3.5.3 Flue Venting
This boiler is not certified for use with Type "B" vent nor with PVC/CPVC venting.
professional experienced in venting system design. The information contained herein should
This boiler
be used as a guide only and is not intended to be used in lieu of qualified technical expertise.
3.5.3.1 VENT SIZING
The vent must be sized in accordance with the ASHRAE Systems and Equipment handbook, Chapter 30 or according
to the vent manufacturer's recommendations. When using manufactured venting systems, consult your vent supplier
for correct sizing and structural support requirements.
Table of Vent Design Parameters
MACH® Boiler Model
C1500GG - C2000GG
experienced in venting system design. The information contained herein should be used as a guide only
and is not intended to be used in lieu of qualified technical expertise.
3.5.3.2 CATEGORY II INSTALLATIONS
®
The MACH C1500GG and C2000GG boilers are dual-certified for both Category II and Category IV operation.
Category II appliances operate with a non-positive vent static pressure and with a vent temperature that may cause
excessive condensate production in the vent. There are several requirements for reliable operation of the boilers
under Category II conditions:
1. A stainless steel vent adapter is required to mate the boiler exhaust connection and the vent pipe. See the table
below for the applicable part numbers.
2. A normally-closed motorized damper is required on the boiler's air intake. See the table below for the applicable
part numbers.
3. The draft, measured inside the vent at the rear of the boiler, must not exceed -0.05" w.c. Excessive negative
draft will cause nuisance trips such as flame failures.
The vent system must be properly drained of condensate before returning to the boiler. Please see Section
4.
3.5.3.6 for information on installing condensate drains in the exhaust vent.
All boiler venting systems should be designed by a qualified venting
Frictional
Resistance
0.22"
All boiler venting systems should be designed by a qualified venting professional
Stack
CO
Temperature
185°F
Page 16
MACH® Gas-Fired Boiler
Natural Gas CO LP Gas
2 2
9.2% 10.5%