Green Mountain GMHB227 Instruction manual

Co n d ensin g Wal l M o unte d
Gas Fired
INSTALLATION, OPERATION &
MAINTENANCE MANUAL
Manufactured by:
ECR International Inc.
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com
PN 240012369 REV. A [08/31/2018]
Models
GMHB227
GMHB380

2
Fully Assembled Boiler Metal Wall Bracket
Safety Relief Valve
30 PSI (227)
50 PSI (380)
Maximum 50 PSI
Temperature Gauge
Includes essential documents. Used for measuring outside
temperature
Used for connecting
condensate piping to boiler
Gas Shuto Valve Document Package Outdoor Sensor
(Optional)
Condensate Drain
Connections
Concentric to Two Pipe
Adapter
PN 240012369, REV A [08/31/2018]
VERIFY CONTENTS RECEIVED

3
1 - Important Information.................................... 5
2 - Introduction.................................................... 7
3 - Component Listing .......................................... 8
4 - Locating Boiler...............................................10
5 - Hydronic Piping............................................. 13
5.1 General .....................................................13
5.2 Special Conditions.......................................13
5.3 Safety Relief Valve and Air Vent ....................14
 .......................................14
5.5 Trim Piping.................................................15
5.6 System Piping ............................................15
5.7 Heating System And Refrigeration..................15
6 - Combustion Air And Vent Piping.................... 19
6.1 General......................................................19
6.2 Removal of Existing Boiler From Common Vent
System........................................................... 19

6.4 Securing Twin Pipe Polypropylene Venting.. 
6.5 Approved Venting Materials...........................21
6.6 Vent Termination........................................21
6.7 Coaxial Venting ....................................... 22

6.9 Twin Pipe Polypropylene and CPVC System...... 24
...................26
 3
6.11 Multiple Boiler Venting - General ............. 33
6.12 Multiple Boiler Venting - Mounting ............ 33
6.13 Multiple Boiler Venting - Layout................ 35
6.14 Multiple Boiler Venting - Parameter Setting 37
6.15 Condensate Piping.....................................38
7 - Gas Supply Piping ......................................... 39
7.1 General .....................................................39
7.2 LP Conversion ............................................39
7.3 Leak Check ...............................................
8 - Electrical Connections ................................... 41
8.1 General .....................................................41
8.2 Electrical Connections..................................41
8.3 Access To Connection Block ..........................42
8.4 Main Supply Connection...............................42
8.5 Install Room Thermostat..............................43
 ...................44
9 - Start Up Procedure........................................ 45
9.1 Central Heating Connections..........................45
9.2 System Startup...........................................46
9.3 Fill Condensate Trap with Water ....................46

9.5 Control Panel..............................................47
.....................48
9.7 De-aeration Function.....................................48
9.8 Commissioning ...........................................48
9.9 Before Gas Conversion ................................
 ..........................
2 Adjustment.....51
9.12 Chimney Sweep Function (C ..... 52
9.13 Check Firing Rate......................................52
9.14 Parameters Settings ..................................53
10 - Operating Instructions................................ 54
...............................54
 ..................... 57
..........................................55

................................................56





........................................62
 ................................62
 ........................................62
 ......................................................62
...... 62
11 - General Maintenance And Cleaning ............. 63
11.1 Beginning of Each Heating Season...............63
11.2 Maintenance And Routine Servicing .............64
11.3 Component Replacement And Cleaning ........64
11.4 Draining the Boiler ....................................65
11.5 Draining the Heating Circuit.................... ....65
11.6 Final Commissioning..................................65
11.7 Final Assembly..........................................65
11.8 Replacement Parts ....................................65
11.9 User Information.......................................66

11.11 Gasket Kit..............................................66
12 - Ratings And Capacities................................ 67
13 - Trouble Shooting......................................... 68
13.1 Initial Fault Findings ..................................68
13.2 Diagnostic Errors ......................................69
13.3 Error Table for Installer ..............................
13.4 Error Codes..............................................71
13.5 Errors In Fault History ...............................73
...................................74
14 - Glossary ..... .................................................76
Appendix A - Wiring Diagrams............................ 78
PN 240012369, REV A [08/31/2018]
TABLE OF CONTENTS

4
Dimensions
Central Heating (Sealed System) GMHB227 GMHB380
Heat Exchanger Max Allowable Working
Pressure  
Max System Pressure 43psig  43psig 
Min System Pressure 7.25  7.25 
Max System temperature 176°F  176°F 
  
  
SYSTEM


PN 240012369, REV A [08/31/2018]
PHYSICAL DATA
DIMENSIONS GMHB227 GMHB380
Height  37 ⁄
Width 17 ¾ 23 ⅝"
Depth 22 ⅝ 25 ⅜
Condensate Trap Connection
 
System Supply 1¼ 1⁄
Gas Connection  
System Return 1¼ 1 ½
Primary Water Content  
B
A
C
D
E
F
G

5
Vent
Connector
Combustion
Air
Front View
All Models
Top View
All Models
GMHB227
0NLY
Bottom View
Dimensions


GMHB380
0NLY
Bottom View
Dimensions



PN 240012369, REV A [08/31/2018]
PHYSICAL DATA
DE
G
F
B
A
DEG
C

B



B
C

F