ECR International COMBI 115 User manual

CONDENSING WALL MOUNTED
GAS FIRED
COMBI Models
115
150
205
HEATING ONLY Models
75
100
125
165
2201 Dwyer Avenue, Utica, NY 13501
Tel. [phone]
www.ecrinternational.com
Granby Industries L.P.
Industries Granby S.E.C.
98 des Industries,
Cowansville, Qc.
J2K 0A1. Canada.
450-378-2334
[e-mail]
www.granbyindustries.com
IN USA CONTACT: IN CANDA CONTACT:

COMBI MODEL - 205

CONTENTS :
INSTALLATION, OPERATION,
AND MAINTENANCE MANUAL
ENGLISH
(240013687)
APPLICATION GUIDE
(240013694)
COMMISSIONING
GUIDE
(240011376)
REQUIRED
INSPECTION SPECIAL
(240011561)
BACK COVER

HEAT ONLY
MODEL 165

PN 240013687 REV A [09/01/2022]
CONDENSING WALL MOUNTED
GAS FIRED
INSTALLATION, OPERATION &
MAINTENANCE MANUAL
Models:
COMBI Models
115
150
205
HEATI NG ONLY Models
75
100
125
165

2
VERI FY CON TEN TS RECEI VED
* Verify proper m odel size before use.
Fully Assem bled Boiler
M e t al W a ll Br ack e t
w / 4 e a W all Scr ew s
and Plugs
3 0 PSI Sa fe t y Re lie f V alv e
Te m p e ra t u re Pr e ssu r e
Gauge
4 ea - 17x24x2 Gaskets
I ncludes Essential
Docum ent s and Warrant y
11x17 Wir e Diagram s
Dra in Va lve * 5 GPM Flow Re st r ict or 2 0 5
Com bi Only
Use d for Valve
Con ne ct ion s Docum ent Pa ckage
Wall Mount Tem plat e
* Ma nifold * Ma nifold
1 6 5 H e at - On ly
* D HW Con ne ct ion s
( D H W con n ect ion qt y . v ar y
be t w e e n m ode ls)
Te m p la t e
240013687 REV A [09/01/2022]
For Par t s list s se e m a nual 240013688 in cluded w it h your boile r lit er at ure pack a ge .

3
TABLE OF CON TEN TS
V er if y Con t e nt s Re ce ive d ...............................................2
Ta ble Of Co nt e nt s ..........................................................3
Physical Data.................................................................4
1 - I m p or t a nt I nf or m a t ion .............................................6
2 - I n t rod uct ion .............................................................7
2.3 Requir em ents For Com m onwealt h Of Massachuset ts:
................................................................................7
2.4 Use Of Carbon Monoxide Monitor ............................7
2.5 Designated Use ....................................................7
2.6 The Unit Must Not:................................................7
2.7 Operat ional Feat ures .............................................7
3 - Com p on e nt List in g .................................................11
4 - Loca t in g Boile r .......................................................14
4.1 Boiler Location Considerat ions .............................14
4.2 Clearances ........................................................15
4.3 Wall Mount ing ....................................................16
5 - Com b ust ion Air An d V e nt Pipin g .............................17
5.1 General .............................................................17
5.2 Rem oval Of Exist ing Boiler From Com m on Vent
Syst em ...................................................................17
 .........................................................17
5.4 Approved Polypropylene Manufact urers ............. 19
5.5 Vent Term inat ion ................................................19
5.6 Coaxial Vent ing I nstructions................................. 21
5.7 Coaxial Vent Screw Placem ent ............................. 22
5.8 Tw in Pipe Syst em s .............................................. 23
5.9 Twin Pipe Polypropylene Adapter Kit I nstallat ion .....24
5.10 Twin Pipe CPVC Adapt er Kit I nst allation.................24
5.11
Twin Pipe Polypropylene Adapt er Kit I nstallat ion
.......25
5.12 Twin Pipe CPVC Adapt er Kit I nstallat ion................... 25
5.13 Securing Twin Pipe Polypropylene Vent ing ......... 26
5.14 Flexible Vent System ........................................ 29
5.15 Condensate Piping ............................................31
6 - Hydronic Piping .........................................................32
6.1 General ............................................................. 32
6.2 Special Condit ions ..............................................33
6.3 Safet y Relief Valve And Air Vent ........................... 33
6.4 Trim Piping......................................................... 34
6.5 System Piping .................................................... 34
 ................. 36
6.7 Manufact urer Recom m endat ion - Flt er On DHW I nlet
..............................................................................37
6.8 Cent ral Heating System .......................................38
6.9 Frost Prot ect ion Mode.......................................... 38
6.10 Pum p Prot ect ion ............................................... 38
7 - Gas Supply Piping ..................................................39
7.1 General ............................................................. 39
7.2 Gas Pipe Recom m endat ions ................................. 40
7.3 Leak Check Gas Piping ........................................ 42
........................................................ 42
8 - Ele ct rica l Co nn ect ion s ............................................43
8.1 General ............................................................. 43
8.2 Elect rical Connections .........................................43
8.3 Access To Connect ion Block.................................. 44
8.4 Main Supply Connect ion ...................................... 44
8.5 I nstall Room Therm ostat ..................................... 45
8.6 Opt ional Out door Air Sensor ( OAS)........................45
8.7 Opt ions For I ndirect Wat er Heat er Connect ions ..... 47
8.8 Use Of 0- 10 VI nput To Cont rol Boiler Wat er Tem perat ure
.................................................................................47
9 - St a r t U p Pr oce du re ................................................. 4 9
9.1 Cent ral Heating System Connections - Cent ral Heat
Models Only ............................................................. 49
9.2 Cent ral Heating System Connect ions - Heating And
Dom est ic Hot Water Models ....................................... 50
9.3 System St art Up ................................................. 51
9.4 Fill Condensate Trap With Wat er ........................... 51
9.5 Control Panel...................................................... 52
9.6 Prior To Com m issioning: ......................................53
9.7 Com m issioning For The First Tim e: ....................... 53
9.8 Aut om atic Calibrat ion Function .............................53
9.9 Manual Calibration Function: ................................ 54
9.10 De-Aerat ion Function ......................................... 54
9.11 Changing The Type Of Gas ................................ 54
9.12 Chim ney Sw eep Function .................................. 55
9.13 Com bustion Adj ustm ent Function ( CO2% ) ........ 55
9.14 Check Firing Rate..............................................56
9.15 Param et er Set tings ...........................................56
9.16 Descript ion Of Param et er s: Fact ory Sett ings...... 57
9. 17 Adj u st ing Maxim u m Heat in g Pow er .................. 59
1 0 - Ope r a t in g I n st r uct ion s ......................................... 6 0
10.1 Test ing For Gas Leaks And Purging The Gas Supply
..............................................................................60
10.2 Boiler Operat ion ................................................ 60
10.3 Cent ral Heating Mode ........................................ 60
10.4 Dom est ic Hot Wat er Mode.................................. 60
10.5 Frost Prot ect ion ................................................ 61
10.6 Pum p And Models Equipped Wit h Three Way Valve
..............................................................................61
10.7 Low Wat er Pressure Sen sor ( I nt er nal) ............ 61
1 1 - Gen e r al M a in t en a nce An d Cle a nin g ...................... 6 2
11.1 Beginning Of Each Heat ing Season...................... 62
11.2 Maint enance And Rout ine Servicing .................. 63
11.3 Com ponent Replacem ent And Cleaning ............ 63
11.4 Draining The Boiler ........................................... 64
11.5 Draining The Heating Circuit ...............................64
11.6 Hydraulic Unit ( Dhw ) ......................................... 65
11.7 Cleaning The Cold Wat er Filt er ............................65
11.8 Final Com m issioning Aft er Annual Serv ice......... 65
11.9 Final Assem bly ................................................. 65
11.10 User I nform at ion .............................................66
11.11 Safet y Flue Therm ost at ..................................... 66
11.1 2 Flue Pressur e Sw it ch ( 125- 150 Only ) ............ 66
11.13 Replacem ent Part s .......................................... 66
1 2 - Ra t in gs An d Ca pa cit ie s ......................................... 6 7
12.1 Ratings And Capacity......................................... 67
 ...................... 67
12.3 High Alt it ude Rat ings .........................................68
12.4 High Altitude Chart............................................ 68
1 3 - Tr ou ble Sh oo t in g ..................................................70
13.1 Error Messages And Reset ting The Boiler .......... 70
13.2 An om alies Table For The I nst aller ........................ 72
1 4 - Glossa r y ...............................................................73
Appe ndix A - W iring D ia gr am s............................... 7 5 - 8 0
240013687 REV A [09/01/2022]

4
Dim ensions
PH YSI CAL DATA
Ce n t ra l H e at in g ( Se a le d Sy st e m ) 7 5 / 1 0 0 / 1 1 5 / 1 2 5 / 1 5 0 / 1 6 5 / 2 0 5
Heat Exchanger Max Allowable Wor king Pressure
50 psi [ 3.45 bar]
Max Syst em Pressure
43 psi [ 2.96 bar]
Min Syst em Pressure
7.25 psi [ 0.50 bar]
Max Syst em t em perat ure
176° F [ 80° C]
Pressure Relief Valve Set ting
30 psi [ 2.11 bar]
Expansion Tank Minim um Size
( pr e- char ge press.)
( 75/ 100/115)
1.5 gal at 11.6 psi
[ 5.7 L at 0.8 bar]
(125/150/165/205)
2.2 gal at 11.6 psi [ 8.3 L at 0.8 bar]
Recom m ended Syst em Pressur e ( cold)
12 psi [ .083 bar]
D om e st ic H ot W a t e r 1 1 5 1 5 0 2 0 5
Max I nlet Wat er Pressure 116 psi [ 8 bar]
Min I nlet Wat er Pressure 2.9 psi [ 0.2 bar]
Min DHW Flow Rate t o Act ivat e 0.65 gpm [ 2.10 L/ m in]
Max DHW Tem perat ur e 140° F [ 60° C]
DHW Wat er Cont ent ( Dom estic Hot Water Flat Plat e Cont ent ) 0.035 gal [ 0.13 L] 0.053 gal [ 0.23L] 0.10 gal [ 0.37 L]
SYSTEM
When boiler is operat ing at m axim um operat ing t em perat ure, providing heat ing wit h all heat em it t ers operat ing, pressure gauge

D I M EN SI ON S 7 5 / 1 0 0 / 1 2 5 1 1 5 / 1 5 0 1 6 5 / 2 0 5
Height 30" [ 763 m m ]
Widt h 17  " [ 450 m m ]
Dept h 13   " [ 345 m m ] 21  [ 546 m m ]
Condensat e Trap Connection
13/16" [ 21 m m ] I D Hose 3/ 4" [ 19.1 m m ] NPT
System Supply 3/ 4” [ 19.1 m m ] 1” [ 25.4 m m]
DHW Out let
( 75, 100 & 125 opt ional)
3/ 4” [ 19.1 m m ]
Copper Sweat
1/ 2” [ 12.7 m m ]
Copper Sweat
165- NA
205 - 3/ 4” [ 19.1 m m ]
Gas Connection 3/ 4” [ 19.1 m m ]
DHW ( Cold Wat er ) I nlet
N/ A
1/ 2” [ 12.7m m ]
Copper Sweat
165 - N/ A
205 - 3/ 4” [ 19.1 m m ]
Boiler Ret ur n 3/ 4” [ 19.1 m m ] Copper Sweat 1” [ 25.4 m m]
Boiler Filling Connection Ext ernal t o Boiler
Prim ary Wat er Cont ent 0.95 gal [ 3.60L] 1 gal [ 3.80 L] 1 gal [ 4.73 L]
BB
I
H
G
F
E
C
A
240013687 REV A [09/01/2022]
A
C
D

5
PH YSI CAL DATA
Vent
Connect or
Com bust ion
Air
Front View
All M ode ls Top View
All M ode ls
1 6 5 H EAT
ON LY
Bot t om Vie w
Dim ensions
2 0 5 COM BI
Bot t om Vie w
Dim ensions
1 5 0 COM BI
Bot t om Vie w
Dim ensions






1 2 5 H EAT
ON LY
Bot t om Vie w
Dim ensions


D E IG
C
B


DEI
G
C
B
F
DEIG
C
B
FH
D E IG
C
B
F
1 1 5 COM BI
Bot t om Vie w
Dim ensions



 
7 5 / 1 0 0
H EAT ON LY
Bot t om Vie w
Dim ensions
H
240013687 REV A [09/01/2022]
B
A
DE IG
C

B

F
 

 

 


 

D
C
E IHGF
B




 


6
1 - I MPORTAN T I N FORMATI ON
CAUTI ON
I ndicates a hazardous sit uat ion which, if not avoided,
could result in m inor or m oderat e inj ury.
!!
W ARN I N G
I ndicates a hazardous sit uat ion which, if not avoided,
could result in deat h or ser iou s inj ur y.
!
D AN GER
I ndicates a hazardous sit uat ion which, if not avoided,
WI LL r esult in deat h or serious in j ur y.
!
This is t he safety alert sym bol. Sym bol alert s you t o
pot ential personal inj ury hazards. Obey all safety m essages
follow ing t his sym bol t o avoid possible inj u ry or deat h.
Becom e fam iliar wit h sym bols ident ifying pot ent ial hazards.

glossary for addit ional infor m at ion.
1 . Sa fe t y I n for m a t ion
W ARN I N G
Do not t am per wit h or use t his boiler for any purpose
ot her than it s int ended use. Failure t o follow t hese
inst ructions could result in deat h or serious inj ury.
Use only m anufact urer recom m ended part s and
accessories.
!
CAUTI ON
Lacerat ion, burn hazard. Met al edges and parts m ay
have sharp edges and/ or m ay be hot . Use appropriat e
personal protect ion equipm ent t o include safet y
glasses and gloves when installing or servicing t his
boiler. Failure t o follow t hese instructions could result
in m inor or m oderat e inj ury.
!!
NOTICE
Used t o address practices not related t o personal
inj ur y.
W ARN I N G
Fire, explosion, asphyxiat ion and electrical shock
hazard. I m proper installat ion could result in death or
serious inj ury. Read this m anual and underst and all
requirem ent s before beginning inst allat ion.
!
W ARN I N G
Fire, Explosion, Asphyxiat ion, Electrical shock hazard!
Flooding will result in dam ages such as elect rical
problem s, corrosion, inoperat ive part s, m old and ot her
unforeseen issues which can occur over t im e. Any
equipm ent det erm ined by a professional as dam aged

shall be replaced. Failure to follow these direct ions will
result in a Hazardous Situation.
!
FOR YOUR SAFETY READ BEFORE OPERATING
DAN GER
!
Water
Temperature
Seng
1st Degree Burn
Exposure Time For
An Adult
2nd and 3rd Degree Burn
Exposure Time For An
Adult
  
  
  
  
  
N ot e : Warning for I nfants, Children, and Elderly:
Great care m ust be taken when exposing t he
afor em ent ioned groups to war m or hot wat er as t hey
can be badly burned in exposure t im es less t han half
of t he t im e for an adult .
H ot W a t e r Ca n Sca ld !
Wat er heat ed t o t em perat ure for clot hes washing,
dish washing and ot her sanit izing needs can scald and
cause per m anent inj ur y.

handicapped persons are m ore likely t o be
perm anent ly inj ured by hot wat er. Never leave t hem
unat t ended in bat htub or shower. Never allow sm all
children t o use a hot wat er t ap or draw t heir own
bat h.

above descript ion, or if st at e laws or local codes
require cert ain wat er t em perat ures at hot water taps,
you m ust t ake special precaut ions:
• Use lowest possible t em perat ure setting.
• I nstall som e t ype of tem pering device, such as
an aut om at ic m ixing valve, at hot wat er t ap or
wat er heat er. Aut om at ic m ixing valve m ust be
selected and inst alled according to m anufacturer's
recom m endat ions and inst ruct ions.
• Wat er passing out of drain valves m ay be
ext rem ely hot . To av oid inj ur y:
• Make sure all connections are t ight .
• 
240013687 REV A [09/01/2022]

7
Check our website frequently for updates: www.ecrinternational.com
Information and specications outlined in this manual in eect at the
t im e o f pr in t ing of t h is m a n ua l. ECR I n t er n a t ion a l r ese r ve s t he r igh t t o
discontinue, change specications or system design at any time without
n ot ice a nd w it h ou t in cur r in g a n y o blig a t ion , w h a t so e ve r .
2 - I N TRODUCTI ON
2 .5 D e sig na t e d U se
• 1 1 5 , 150 and 2 0 5 provide bot h cent ral heat ing and
dom est ic hot wat er.
• 7 5 , 1 0 0 ,1 2 5 and 1 6 5 central heat ing only.
• I ndoor installat ion.
• Closet or alcove installat ion. Direct Vent Boiler does not
require air vent s when installed in closet or room .
• Direct vent boiler.
• 
( LP/ pr opane) .
2 - I nt r odu ct ion
2 .1 I nst allat ion shall conform t o r equirem ent s of aut horit y
having j urisdiction or in absence of such requirem ent s:
UN I TED STATES
• Nat ional Fuel Gas Code, ANSI Z223.1/ NFPA 54
.
• Nat ional Elect rical Code, NFPA 70.
CAN AD A
• Nat ural Gas and Propane I nstallat ion Code, CAN/ CSA
B149.1.
• Canadian Elect rical Code, Part I , Safet y Standard for
Elect rical I nstallat ions, CSA C22.1
2 .2 Where required by aut horit y having j urisdict ion,
installat ion shall conform t o Standard for Cont rols and Safety
Dev ices f or Aut om at ically Fired Boiler s, ANSI / ASME CSD- 1 .
Boiler int ern al low wat er dev ice does not qu alify for CSD- 1 .

2 .3 Re quire m en t s for Com m on w e alt h of
M a ssa chu se t t s:
Boiler installat ion m ust confor m t o Com m onw ealt h of
Massachusett s code 248 CMR which includes but is not lim it ed
to:

2 .6 Th e u nit M UST N OT:
• Directly heat potable wat er. I ndirect heat ing is
acceptable.
• Heat w at er w it h non- hy dr onic heat ing syst em chem icals
present ( exam ple, sw im m ing pool wat er ).
• Toxic chem icals, such as t hose used for boiler
t reat m ent , shall not be int roduced int o pot able wat er.
• Exceed 43 psig (2.96 bar) m axim um syst em pressure,
or drop below m inim um syst em pressure 7.25 psig ( .50
bar)
• Exceed 1 76 ° F ( 80° C) syst em design t em per at ur e.
2 .7 Op er a t ion a l Fe a t ur es
• 7 5 Modulat es input to provide CH Turndown 4.5: 1
• 1 0 0 Modulat es input to provide CH Turndown 5.6: 1
• 1 1 5 Modulat es input to provide CH Turndown 5.6: 1,
DHW Turndown 6.9: 1
• 1 2 5 Modulat es input to provide CH Turndown 5.7: 1
• 1 5 0 Modulat es input to provide CH Turndown 5.7: 1,
DHW Turndown 7: 1
• 1 6 5 Modulat es input to provide CH Turndown 5.5: 1
• 2 0 5 Modulat es input to provide CH Turndown 5.5: 1,
DHW t urndown 7: 1
M a xim u m ou t pu t a v aila ble f or d om e st ic h ot w a t er :
115 - 1 05 ,5 00 bt u/ hr ( 33. 8 kW) capable of prov iding
2. 5 ( U. S.) gpm ( 9. 5 lit er s/ m in ) w it h a t em perat ur e r ise
of 70° F/ 39° C.
1 5 0 - 13 6, 00 0 bt u/ h ( 4 0 k W) , capable of prov iding 3 .5
( U.S. ) gpm ( 13 .2 lit ers/ m in) wit h a t em perat ur e r ise of
70° F/ 39° C.
205 - 1 80 ,0 00 bt u/ h ( 53 kW) , capable of pr oviding 5 .0
( U.S. ) gpm ( 18 .9 lit ers/ m in) wit h t em perat u re r ise of
70° F/ 39° C.
• 
• Opt ional Out door Tem perat ure Reset .
• Heat exchanger over heat prot ection.
• Boiler operat ing at m axim um operating t em perature,
providing heat, pressure gauge should not indicat e
m ore than 26.11 psi / 1.80 bar. I f reading exceeds t his

240013687 REV A [09/01/2022]
2 .4 Ma nu fa ct ure r recom m e nds u se of Ca rbon
Monox ide m onit or m ay be re qu ir em e nt of loca l
j u risd ict io n.

8
3 - COM PON EN T LI STI N G
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
I TEM
NO. H eat Only - 7 5 & 1 0 0
1Pum p w it h Air Separat or
2Boiler Drain Tap
3Gas Valve
4
53-Way Valve wit h Motor
6
Wat er Safet y Therm ostat
7
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n for
clarit y)
8Flue Sensor
9Coaxial Flue Connector
1 0 Heat Exchanger Tem perat ure
Prot ect or
1 1 Heat Exchanger
1 2 Bu rner ( not show n)
1 3 I gnit ion elect rode
1 4 Flam e Det ect ion Elect rode
1 5 Air/ Gas Manifold
1 6 Fan
1 7 Venturi
1 8 Air Vent
2
1
1 0
5
6
7
1 4
1 5
3
1 3
1 6
1 2
4
1 1
9
1 7
1 8
Exhaust Port
I nt ake Port
8
240013687 REV A [09/01/2022]
Heat Only - 7 5 & 1 0 0

9
3 - COM PON EN T LI STI N G
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
I TEM
NO. H eat Only - 1 2 5
1Pum p w it h Air Separat or
2Boiler Drain Tap
3Gas Valve
4
53-Way Valve wit h Motor
6
Wat er Safet y Therm ostat
7
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n for
clarit y)
8Flue Sensor
9Pressure Swit ch
1 0 Coaxial Flue Connector
1 1 Heat Exchanger Tem perat ure
Prot ect or
1 2 Heat Exchanger
1 3 Bu rner ( not show n)
1 4 I gnit ion elect rode
1 5 Flam e Det ect ion Elect rode
1 6 Air/ Gas Manifold
1 7 Venturi
1 8 Fan
1 9 Air Vent
2
1
1 0
5
8
6
7
1 4
1 5
3
1 3
1 8
1 6
1 7
1 2
4
1 9
1 1
9
Exhaust Port
I nt ake Port
240013687 REV A [09/01/2022]
Heat Only - 1 2 5

1 0
3 - COM PON EN T LI STI N G
I TEM
NO. H eat Only - 1 6 5
1Pum p
2Boiler Drain Tap
3
4Gas Valve
5
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n for
clarit y)
6Wat er Safet y Therm ost at
7Flue Sensor
8Coaxial Connector
9Heat Exchanger Tem perat ure
Prot ect or
1 0 Heat Exchanger
1 1 Bur ner Door Tem perat ur e
Sensor
1 2 Bu rner ( not show n)
1 3 I gnit ion Elect rode
1 4 Flam e Det ect ion Elect rode
1 5 Air/ Gas Blend Manifold
1 6 Air Vent
1 7 Venturi
1 8 Silencer
1 9 Fan
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
2
1
8
7
6
5
1 3
9
1 4
4
1 2
1 9
1 5
1 7
1 0
1 6
1 1
1 8
3
Exhaust Port
I nt ake Port
240013687 REV A [09/01/2022]
Heat Only - 1 6 5

1 1
3 - COM PON EN T LI STI N G
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
2
1
3
8 7
1 0
5
1 2
1 3
1 1
1 8
1 4
1 9
6
1 6
2 1
2 0
1 5
9
2 3
4
I TEM
NO. Com bi - 1 1 5
1Pum p w it h Air Separat or
2Boiler Drain Tap
3Dom estic Hot Wat er Turbine
4DHW Priorit y Sensor
5Cont rolled Fast Fill
6Gas Valve
7NTC DHW Sensor
8
93-Way Valve wit h Motor
1 0 Check Valve
1 1 DHW Heat Exchanger
1 2 Wat er Safet y Therm ost at
1 3
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n f or
clarit y)
1 4 Coaxial Connector
1 5 Heat Exchanger Tem perat ure
Prot ect or
1 6 Flue Sensor
1 7 Heat Exchanger
1 8 Bu rner ( not show n)
1 9 I gnit ion Elect rode
2 0 Flam e Det ect ion Elect rode
2 1 Air/ Gas Blend Manifold
2 2 Venturi
2 3 Fan
2 4 Air Vent
2 2
1 7
2 4
Exhaust Port
I nt ake Port
240013687 REV A [09/01/2022]
Com bi - 1 1 5

1 2
3 - COM PON EN T LI STI N G
I TEM
NO. Com bi - 1 5 0
1Pum p w it h Air Separat or
2Boiler Drain Tap
3Dom estic Hot Wat er Turbine
4DHW Priorit y Sensor
5Cont rolled Fast Fill
6Gas Valve
7NTC DHW Sensor
8
93-Way Valve wit h Motor
1 0 Check Valve
1 1 DHW Heat Exchanger
1 2 Wat er Safet y Therm ost at
1 3
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n f or
clarit y)
1 4 Flue Sensor
1 5 Pressure Swit ch
1 6 Coaxial Connector
1 7 Heat Exchanger Tem perat ure
Prot ect or
1 8 Heat Exchanger
1 9 Bu rner ( not show n)
2 0 I gnit ion Elect rode
2 1 Flam e Det ect ion Elect rode
2 2 Air/ Gas Blend Manifold
2 3 Venturi
2 4 Fan
2 5 Air Vent
2
1
3
8
1 5
7
1 0
5
1 4
1 3
1 2
1 1
1 9
1 6
2 0
6
1 8
2 2
2 1
2 3
1 7
9
2 4
4
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
Exhaust Port
I nt ake Port
2 5
240013687 REV A [09/01/2022]
Com bi - 1 5 0

1 3
I TEM
NO. Com bi - 2 0 5
1Pum p
2Boiler Drain Tap
3Dom estic Hot Wat er Turbine
4DHW Priorit y Sensor
5DHW Heat Exchanger
6Gas Valve
7NTC DHW Sensor
8
93-Way Valve wit h Motor
1 0
NTC Heat ing sensor ( Supply /
Ret urn)
QTY 2, ( 1 Show n f or clar it y)
1 1 Wat er Safet y Therm ost at
1 2 Flue Sensor
1 3 Coaxial Connector
1 4 Heat Exchanger Tem perat ure
Prot ect or
1 5 Heat Exchanger
1 6 Bur ner Door Tem perat ur e
Sensor
1 7 Bu rner ( not show n)
1 8 I gnit ion Elect rode
1 9 Flam e Det ect ion Elect rode
2 0 Air/ Gas Manifold
2 1 Air Vent
2 2 Venturi
2 3 Silencer
2 4 Fan
3
1
2
7
1 3
5
1 2
1 1
1 0
9
1 9
1 4
2 0
6
1 8
2 2
2 1
2 4
1 5
8
3 - COM PON EN T LI STI N G
I llust rations are a depict ion of t he boiler for general location of part s and m ay vary depending on model.
1 6
1 7
2 3
4
Exhaust Port
I nt ake Port
240013687 REV A [09/01/2022]
Com bi - 2 0 5

1 4
4 - LOCATI N G BOI LER
4 .1 Boile r Loca t ion Con sid er a t ion s
• Am bient room t em perat ure always above 32° F ( 0° C) t o
prevent freezing of liquid condensate.
• Approved for installat ion in closets or alcove provided
it is corr ect ly designed for t hat purpose and m inim um
clearances are m et .
• Prot ect gas ignit ion system com ponents from water
( dripping, spraying, rain, et c.) during operat ion and
ser vice ( circulat or replacem ent , condensat e t r ap,
cont r ol r eplacem ent , et c.) .
• Access t o out doors t o m eet m inim um and m axim um
pipe lengt hs for com bustion air and vent piping. See
section 5.
• Disposal of condensat e. See sect ion 5.
• Dr ainage of w at er ( or w at er - ant ifr eeze solut ion)
during boiler service or from safety relief valve
discharge. See sect ion 6.
• Access t o syst em wat er piping, gas supply, and
electrical service. See sect ions 6, 7 and 8.
• Clearances t o com bust ible m at erials and service
clear ances. See Table 1 and Figures pg. 15.
• 
capable of support ing t he weight of t he boiler.
• Room - sealed boiler inst alled in a room cont aining bat h
or shower shall be installed so person using bat h or
shower cannot touch any electrical swit ch or boiler
cont rol ut ilizing line volt age electricit y.
• Mult iple Boilers can be w all m ount ed, placed side by
side, or back to back.
• Observe service clearances in all installations.
• For Direct Vent installat ions, air vents are not required
in room boiler is inst alled in, or when installed in closet
or com par tm ent .
• Requires fresh air int ake piped from out doors, do not
install where air inlet is dusty or dirt y.
• 


air intake sect ion of t he vent pipe. Boiler perform ance
at m axim um vent lengt h m ay be im pact ed when an air

• Use of unregulat ed gas ( well gas) is not m anufact urer
recom ended wit h t his boiler.
TABLE 1 : BOI LER CLEARAN CES
Dim ension Com bu st ib le
M a t er ia ls (1)
M a nu fa ct u re r
Re com m en de d
for Ser vice(1)(2)
To p
0" ( 0 cm ) 8- 5/ 8 " ( 220 m m )
Left Side
1- 3/ 4" ( 45 m m ) 1- 3/ 4" ( 45 m m )
Right Side
1- 3/ 4" ( 45 m m ) 1- 3/ 4" ( 45 m m )
Front
0" ( 0 m m ) 17- 3/ 4" ( 45 0 m m )
Back
0" ( 0 m m ) 0" ( 0 m m )
Bott om
0" ( 0 m m ) * 9- 1 3/ 1 6"
( 250 m m )
Com bust ion Air/
Vent piping
0" ( 0 m m ) 6" ( 160 m m )
(1) Requ ired dist an ces m easur ed fr om boiler j acket .
(2) Serv ice, pr oper operat ion clearance recom m endat ion.
* Allowance for piping at t he bot t om of boiler not included.
W ARN I N G
Fire Hazard! Do not inst all on carpeting. Failure to
follow t hese instructions could result in deat h or
ser iou s inj ur y.
!

protection clearances.
240013687 REV A [09/01/2022]

1 5
4 - LOCATI N G BOI LER
Minimum ClearanceMinimum Clearance
17 ¾ in. [450 mm ]17 ¾ in. [450 mm ]
From Front of BoilerFrom Front of Boiler
13.58 in /
345.00 mm
11    inin
[45 mm][45 mm]
17  in
[450 mm]
8 ⅝in [220 mm]
9 in [250 mm]
30 in
[763 mm]
75, 100, 115, 125 & 150
13   in
[345 mm]
4 .2 Clea ra nces
165 & 205
21½in
[546 mm]
11    inin
[45 mm][45 mm]
Left Side View
of Boiler
Front View of
Boiler
Service Cle a rances
Com b ust ible Cle a ra n ce s
1  in
[45 mm]
17in
Top ViewTop View
BackBack
Closet Installation
0 in / 0 m m bet ween Back of Unit and wall0 in / 0 m m bet ween Back of Unit and wall
1  in
[45 mm]
1in
[45 mm]
1in
[45 mm]
[450 mm]
Front View of Boiler
0in
[0 mm]
0in
[0 mm]
Top View
0in
[0 mm]
0in
[0 mm]
240013687 REV A [09/01/2022]

1 6
4 - LOCATI N G BOI LER
CAUTI ON
Boiler w eight ex ceeds 14 0 pounds ( 63.5 kg) . Do n ot
lift boiler ont o wall wit hout assist ance.
!!
4 .3 W a ll M ou nt in g
1. Decide position of boiler on t he wall allowing for all

2. Tape t em plat e to the wall. Ensure t em plat e is level and
upright . Mar k posit ion of holes for boiler m ount ing bracket
and plum bing connections.
3. 
4. 
the w all t o side wall, t hen along side wall ( ensur e lines are
parallel and sloped properly t owards the boiler, refer t o

5. 
• 75, 100, 115, 125 & 150 - 4 " [ 110 m m ] diam et er
• 165 & 205 - 5 " [ 135 m m ] diam et er
6. Pr e- pipe supply and r et ur n w at er connect ions w it h fact ory

7. Mount boiler on wall using w all m ount ing bracket included
wit h unit.
8. Adj ust t he posit ion of t he boiler v erify it is level and plu m b.
N ot e
Lift boiler using chassis. Do not use front j acket,

m ay cause dam age t o t he boiler.


piping can be dam aged if subj ected t o excessive
torque.
N ot e
FI GURE 4 - 2 W a ll M ount Bra cke t ( I nclude d)
Cent er bracket s. Avoid
overhang on sides of
wall m ount bracket .
Use four ( 4 ) pr edr illed
holes for m ount ing
bracket t o wall
240013687 REV A [09/01/2022]