UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual page 86

I m port a nt Sa fet y I nform a t ion ........................................................................................ 3
La bor Sa ving Piping M a nifolds / N ea r Boiler Piping Connect ions .................................... 4
Genera l I nform a t ion - H ydronic Piping ........................................................................... 6
Genera l I nform a t ion - w iring .......................................................................................... 8
Pipin g a n d W ir in g D ia gr a m s
Piping Legend ................................................................................................................. 9
75F, 100F, 125F w/ Zone circulat ors & DHW Tank- piping diagram ..................................... 10
75F, 100F, 125F W/ I ndirect Zone circulat ors, DHW t ank w/ Sensor - Wiring Dia. .................. 11
75F, 100F, 125F w/ I ndirect Zone circulat ors & DHW Tank w/ t - st at - WI RI NG Dia. ................ 12
75F, 100F, 125F wit h Zone Valves & DHW Tank - PI PI NG Diagram .................................... 13
75F, 100F, 125F wit h Zone Valves, DHW Tank W/ Sensor - Wiring Dia. ............................... 14
75F, 100F, 125F zone valves, DHW t ank w/ t - st at - wiring Diagram .................................... 15
165F wit h Zone Circulat ors - PI PI NG Diagram ................................................................. 16
165F indirect Zone Circulat ors, DHW Tank w/ T- St at - Wiring Dia. ..................................... 17
165F wit h zone Valves - PI PI NG Diagram ....................................................................... 18
165F wit h I ndirect Zone Valves, DHW Tank, Tank T- St at - Wiring Dia. ............................... 19
115F, 150F & 205F wit h zone circulat ors - PI PI NG Diagram .............................................. 20
115F, 150F & 205F wit h zone Circulat ors - Wiring Diagram ............................................... 21
115F, 150F & 205F wit h Zone Valves - PI PI NG Diagram ................................................... 22
115F, 150F & 205F wit h Zone Valves - Wiring Diagram ................................................... 23
EXTERNAL buffer TANK - PIPING Diagram ...................................................................... 24
EXTERNAL buffer TANK - Wiring Diagram ....................................................................... 26
Opt iona l Equipm ent ...................................................................................................... 2 9
CHART 1 -1k Ω OUTDOOR AIR SENSOR DATA ................................................................. 29
CHART 2 -10k Ω INDIRECT TANK SENSOR DATA ............................................................. 29
Accessories .................................................................................................................. 3 0
Outdoor Temperature Sensor Kit ................................................................................... 30
I ndirect St orage Tank Sensor ...................................................................................... 31
W ir in g D ia gr a m s
Single Zone Circulat or Wiring Using ARGO AR822- I I ........................................................ 32
75 & 100 - Heat Only Wiring Diagram ............................................................................ 33
125 - Heat Only Wiring Diagram ................................................................................... 34
165 - Heat Only Wiring Diagram ................................................................................... 35
115 - com bi Wiring Diagram ........................................................................................ 36
150 - com bi Wiring Diagram ........................................................................................ 37
205 - com bi Wiring Diagram ........................................................................................ 38
Altitude Effects On Boiler Performance ......................................................................... 3 9
Applica t ion Ta ble - I ndirect H ot W a t er Ta nk Sizing ...................................................... 4 1
LW CO W iring Dia gra m .................................................................................................. 4 2
Piping Dia gra m - LW CO Loca t ion .................................................................................. 4 3
Low Water Cutoff - Detail ............................................................................................. 4 4
Error Code Ta ble ........................................................................................................... 4 5
Troubleshoot ing Cha rt .................................................................................................. 4 6
Fa ult Solut ion Sect ions ................................................................................................. 4 8
PARAM ETER CH AN GE H I STORY..................................................................................... 5 2
T ABLE O F CO N T EN T S
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PN 240012875 REV. D [ 03/ 15/ 2022]