HCD2-501
42-9156 REV. 1
HYDROTHERM
IN UNITED STATES: 260 NORTH ELM ST., WESTFIELD, MA 01085 (413) 564-5515/FAX (413) 568-9613
IN CANADA: 5211 CREEKBANK ROAD, MISSISSAUGA, ONT. L4W 1R3 (905) 625-2991/FAX (905) 625-6610
MODEL HC-D SERIES
INSTALLATION,
OPERATION &
MAINTENANCE
MANUAL & REPLACE-
MENT PARTS MANUAL
Gas-Fired Cast Iron Water Boilers
65,000 to 165,000 Btuh Input
Intermittent Pilot & Vent Damper
SECTION 1: BOILER INSTALLATION
Introduction ...............................................................2
Step 1: Locating & Setting the Boiler ........................3
Step 2: Installing/Purging Water Piping.....................4
Step 3: Venting the Boiler..........................................6
Step 4: Installing/Testing Gas Piping ........................8
Step 5: Wiring the Boiler ...........................................9
SECTION 2: START-UP & OPERATION
Safety Controls........................................................15
Start-Up & Adjustments...........................................15
SECTION 3: MAINTENANCE
Water Treatment......................................................18
Freeze Protection ....................................................18
Before Each Heating Season.................................. 18
How To Change Orifices..........................................19
Troubleshooting.......................................................19
Appendix A (French Vent Damper Translation)....... 20
Replacement Parts List ......................................... 21
MEA# 90-77-E
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