KAH Operation & Maintenance Guide
Page: 23 of 88
Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | [email protected] | www.krueger-hvac.com
SECTION 2 - START-UP & OPERATION (CONTINUED)
Pre-Start-Up Checklist
Refer to Figure 22 (below) for installing the gas furnace condensate drain trap.
Use the following information to check the AHU before starting it:
•
Verify the AHU was properly started up, and that airflow is at the design maximum for the heating cycle. Refer to
the air balance report.
•
Set the bypass damper, if provided.
•
Airflow proving switch for main supply fan installed and operational.
•
Check with the control technician: two-minute post-purge programmed in AHU controller. Upon call for unit stop,
burner cycles off, then AHU fan cycles off two minutes later.
NOTE -
Condensate trap must be installed prior to start-up by the installing contractor.
FIGURE 22 - GAS FURNACE CONDENSATE DRAIN TRAP
1
1
2
4
3
1
2
3
4
Flow
Burner
Assy
Field Installed Condensate
Drain Piping - By Others
Clean Out
Water Seal Prime/Fill
Pitch 1/4" / Foot
Pitch
ID
Motor
MODEL
DRAIN NPT
A
B
C
DF-15 / 25
1/2"
4"
2"
2"
DF-30 / 50
1/2"
8"
4"
4"
DF-60 / 75
1"
8"
4"
4"
DF-85 / 200
1"
12"
6"
6"
DF-225 / 400
1"
16"
8"
8"
