Installation / Operation Instruction Manual

Table of Contents
i
B RADFORD W HITE
SECTION 1
GENERAL INFORMATION
1.A Introduction ....................................................... 5
1.B Warranty ........................................................... 5
1.C Model Identication ........................................... 5
1.D Safety Notes ..................................................... 6
1.E Model Overview ............................................... 8
1.F Dimensions, Indoor Models ............................ 14
1.G Dimensions, Outdoor Models ......................... 16
1.H The Installation Kit (installation parts box). .... 18
SECTION 2
LOCATING THE UNIT
2.A General Information ........................................ 20
2.B Locating Appliance for Correct Vent Distance
from Outside Wall or Roof Termination ........... 20
SECTION 3
VENTING AND COMBUSTION AIR
3.A General Venting .............................................. 21
3.B Combustion Air ............................................... 21
3.C Venting ............................................................ 24
3.D Common Venting ............................................ 26
3.E Locating Vent and Combustion Air Terminals . 26
3.F Common Vent Test ......................................... 30
SECTION 4
GAS SUPPLY AND PIPING ............................. 31
SECTION 5
PUMP REQUIREMENTS
5.A Boiler Flow and Head Requirements - Boiler . 32
5.B Water Heater Flow and
Head Requirements - Heater .......................... 32
SECTION 6
WATER CONNECTIONS
6.A Boiler ..................................................... 34
6.A.1 Boiler Water Piping ........................................ 34
6.A.2 Boiler Cold Water Make-Up ............................ 34
6.A.3 Condensate Drain ........................................... 35
6.A.4 Freeze Protection ........................................... 35
6.A.5 Boiler Suggested Piping Schematics .............. 35
6.A.6 Recognized Chemicals ................................... 36
6.B Water Heater ......................................... 42
6.B.1 Heater Water Quality ...................................... 42
6.B.2 Piping Requirements ...................................... 42
6.B.3 Cold Water Make-Up ...................................... 42
6.B.4 Condensate Drain ........................................... 42
6.B.5 Freeze Protection ........................................... 42
6.B.6 Heater Suggested Piping Schematics ............ 42
6.B.7 Heater Suggested Pumps .............................. 43
SECTION 7
INSTALLATION AND WIRING
7.A Installation Warnings ...................................... 45
7.B Main Power Connections ................................ 45
7.B.1 Pump Connections and Operation ................. 45
7.B.2 Variable Speed Pump Control .............................. 46
7.C Hydronic Heating Using
External Modulation Control .......................... 46
7.D Optional Field Connections ............................ 46
7.E Lead Lag Connections .................................... 48
7.F Building Automation System Connections ...... 49
7.G System Wiring Diagram .................................. 51
7.H Ladder Diagram .............................................. 52