MR SERIES
INSTALLATION
MANUAL AND
REPLACEMENT
PARTS LIST
Modular Gas-Fired Cast
Iron Water Heating Plants
360,000 to 2,400,000
Btuh Input
Applicable For Larger Heating
Plants Using Boiler Banks Of
8-Modules Or Less
NOTE: If shop drawings have not been provided, refer to the Appendices at the rear of this manual for sizing
(breeching, chimney & gas piping) and control system data.
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
SECTION 1: INTRODUCTION
Heating Plant Design............................................2
Code Compliance.................................................2
Heating Plant Shipment........................................2
Heating Plant Dimensions....................................3
SECTION 2: INSTALLING MODULES
Step 1: Planning Ahead........................................4
Step 2: Arranging Heating Plant...........................5
Step 3: Setting & Aligning Modules......................5
SECTION 3: INSTALLING WATER PIPING
Step 1: Planning Ahead........................................6
Step 2: MC Heat Exchangers...............................6
Step 3: Supply & Return Headers........................6
Step 4: Hydronic Components..............................7
Step 5 Hydrotesting The Systems........................8
Combination Heat/Cool Systems........................10
SECTION 4: VENTING THE HEATING PLANT
Step 1: Planning Ahead......................................11
Step 2: Drafthoods & Vent Dampers...................12
Step 3: Vent Connectors & Slip Joints................13
Step 4: Breeching Runs.......................................14
SECTION 5: INSTALLING JACKETS
Jacket Assembly..................................................15
SECTION 6: INSTALLING GAS PIPING
Step 1: Gas Main & Gas Headers.......................16
Step 2: Test Gas Piping.......................................16
SECTION 7: WIRING THE HEATING PLANT
Module Wiring......................................................17
SECTION 8: HEATING PLANT START-UP
Step 1: Planning Ahead......................................19
Step 2: Start-Up & Adjustments..........................19
Step 3: How To Change Orifices.........................21
APPENDICES
A: Breeching/Chimney Sizing..............................22
B: Gas Pipe Sizing..............................................24
C: Control Guidelines..........................................26
D: Field Installation of Vent Damper....................31
Replacement Parts List.......................................32
MRC2-1103
42-9154
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