background image

 

 

 Installation & Operating Instructions 

Models MP 20, MP 32, MP 40 & MP 50 

TO

 

THE

 

INSTALLER:

 

This

 

manual

 

is

 

the

 

property

 

of

 

the

 

owner

 

and

 

must

 

be

 

a

xed

 

near

 

the

 

water

 

heater

 

for

 

future

 

reference.

 

 

TO

 

THE

 

OWNER:

 

This

 

water

 

heater

 

should

 

be

 

inspected

 

annually

 

by

 

a

 

quali

ed

 

Service

 

Agency.

 

 

Improper installa

on, adjustment, altera

on, 

service or maintenance can cause injury or 

property damage. Refer to this manual. For 

assistance or addi

onal informa

on, consult 

a quali

ed Installer or Service Agency.

 

 

 

Do not store or use gasoline or other 

amma

ble vapors and liquids in the vicinity of this or 

any other appliance. Installa

on and service 

must be performed by a quali

ed Installer or 

Service Agency. 

 WARNING 

 

FOR YOUR 

SAFETY

 

INDIRECT WATER HEATERS 

 

 

 Installation & Operating Instructions 

Models MP 20, MP 32, MP 40 & MP 50 

TO

 

THE

 

INSTALLER:

 

This

 

manual

 

is

 

the

 

property

 

of

 

the

 

owner

 

and

 

must

 

be

 

a

xed

 

near

 

the

 

water

 

heater

 

for

 

future

 

reference.

 

 

TO

 

THE

 

OWNER:

 

This

 

water

 

heater

 

should

 

be

 

inspected

 

annually

 

by

 

a

 

quali

ed

 

Service

 

Agency.

 

 

Improper installa

on, adjustment, altera

on, 

service or maintenance can cause injury or 

property damage. Refer to this manual. For 

assistance or addi

onal informa

on, consult 

a quali

ed Installer or Service Agency.

 

 

 

Do not store or use gasoline or other 

amma

ble vapors and liquids in the vicinity of this or 

any other appliance. Installa

on and service 

must be performed by a quali

ed Installer or 

Service Agency. 

 WARNING 

 

FOR YOUR 

SAFETY

 

INDIRECT WATER HEATERS 

 

 

 Installation & Operating Instructions 

Models MP 20, MP 32, MP 40 & MP 50 

TO

 

THE

 

INSTALLER:

 

This

 

manual

 

is

 

the

 

property

 

of

 

the

 

owner

 

and

 

must

 

be

 

a

xed

 

near

 

the

 

water

 

heater

 

for

 

future

 

reference.

 

 

TO

 

THE

 

OWNER:

 

This

 

water

 

heater

 

should

 

be

 

inspected

 

annually

 

by

 

a

 

quali

ed

 

Service

 

Agency.

 

 

Improper installa

on, adjustment, altera

on, 

service or maintenance can cause injury or 

property damage. Refer to this manual. For 

assistance or addi

onal informa

on, consult 

a quali

ed Installer or Service Agency.

 

 

 

Do not store or use gasoline or other 

amma

ble vapors and liquids in the vicinity of this or 

any other appliance. Installa

on and service 

must be performed by a quali

ed Installer or 

Service Agency. 

 WARNING 

 

FOR YOUR 

SAFETY

 

INDIRECT WATER HEATERS 

NEW JERSEY HEADQUARTERS • 439 MAIN ROAD, TOWACO, NJ 07082

PHONE: 800-221-1522  • WEBSITE: WWW.DHTNET. COM

Manufacturers and Designers Since 1938

Summary of Contents for MP 20

Page 1: ...intenance can cause injury or property damage Refer to this manual For assistance or addi onal informa on consult a quali ed Installer or Service Agency Do not store or use gasoline or other amma ble vapors and liquids in the vicinity of this or any other appliance Installa on and service must be performed by a quali ed Installer or Service Agency WARNING FOR YOUR SAFETY INDIRECT WATER HEATERS Ins...

Page 2: ...table piping shall connect the drain pan to a properly operating floor drain Relief Valve Requirements Caution To reduce the risk of excessive pressures and temperatures in this water heater install temperature and pressure protective equipment required by local codes It should be no less than a combination tempera ture and pressure relief valve certified by a nationally recognized testing laborat...

Page 3: ...wers require large quantities of hot water in a short period of time Contact fixture manufacturer for quantity of water required Generally speaking these circumstances can only be met with larger storage volumes c Domestic Water Temperature Most residential usage will be satisfied with 119ºF water the temperature setting recommended by the Consumer Product Safety Commission Some applications s uc ...

Page 4: ...4 22 4 22 4 B 31 1 39 47 9 56 C 27 6 36 44 4 53 2 Boiler Supply Boiler Return Drain Thermometer Cold Water Inlet Hot Water Outlet T P Relief Valve Drain Valve Boiler Supply Boiler Return Front of Tank Tank Thermostat located under cover Dimensions A B C 4 ...

Page 5: ...t 5 GPM 8 GPM 12 GPM MP 20 1 2 2 9 6 2 hd MP 32 1 6 3 8 8 0 hd MP 40 1 6 3 6 7 6 hd MP 50 1 8 4 2 8 8 hd Pressure Drop Graph 2 0 4 0 6 0 8 0 10 0 5 GPM 8 GPM 12 GPM Primary Flow Rate Head Loss FT HD PressureDrop Graph MP 20 MP 32 MP 40 MP 50 5 50 32 40 20 ...

Page 6: ...134 95 156 111 140 000 134 95 156 111 165 000 168 119 195 000 Performance Data MP 32 Con nuous Draw Ra ngs Based Upon Boiler s Ability to Maintain 180º F Model MP 32 Circulator Flow GPM 5 5 8 8 12 12 DHW Temperature 120ºF 140ºF 120ºF 140ºF 120ºF 140ºF Boiler Hea ng Capacity in Btu Hr Output 45 000 106 78 106 78 60 000 134 97 134 97 75 000 162 116 162 116 95 000 168 120 188 134 198 141 115 000 168 ...

Page 7: ...24 192 138 223 159 140 000 192 138 223 159 165 000 240 171 195 000 Performance Data MP 50 Con nuous Draw Ra ngs Based Upon Boiler s Ability to Maintain 180º F Model MP 50 Circulator Flow GPM 5 5 8 8 12 12 DHW Temperature 120ºF 140ºF 120ºF 140ºF 120ºF 140ºF Boiler Hea ng Capacity in Btu Hr Output 45 000 117 91 117 91 60 000 142 108 142 108 75 000 167 125 167 125 95 000 201 148 201 148 201 161 115 0...

Page 8: ... water leakage The floor or area where the tank is installed must be capable of suppor ng the tank when filled with water Refer to the Specifica ons Table on the page 3 FOR YOUR SAFETY Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance Controls on this appliance could ignite vapors causing an explosion IV Installation Piping General a A...

Page 9: ...changer Pressure Drop hd Domes c Water Connec on Sizes MP 20 5 GPM 1 2 3 4 MP 32 8 GPM 3 8 3 4 MP 40 12 GPM 7 6 3 4 MP 50 12 GPM 8 8 3 4 Tubing Type Flow Rate 10 GPM Flow Rate 15 GPM Type K 3 1 psi 6 5 PSI Type L 2 7 psi 5 7 psi Type M 2 3 psi 4 7 psi Fi ng Wrought Cast 90º Elbow 1 4 45º Elbow 1 2 Tee Run 1 2 1 2 Tee Branch 3 5 Long radius 90º Elbow 2 180º Bend 2 Gate Valve 1 ...

Page 10: ...n the tank and the back ow device see piping diagram Refer to Thermal Expansion Tank manufacturer s lit erature for sizing and installa on informa on E Vacuum Breaker DHT recommends that a vacuum breaker be installed on the domes c piping to the heater The vacuum breaker protects the heater in the event that the tank pressure falls below atmos pheric pressure F Temperature Pressure Relief Valve T ...

Page 11: ... or its own circulator The heater temperature is maintained by the use of an immersion type aq uastat The aquastat is installed into the im mersion well on the heater The aquastat operates in much the same way as a thermostat When the temperature falls inside the tank the set of contacts make close and when the temperature rises the contacts break open The aquastat should be ed into the boiler sys...

Page 12: ...ntrols The con tacts open break on temperature rise when the tank reaches the set temperature Connect system wires to wiring block located under cover Auxiliary contacts Terminals C 1 purple brown for solar hea ng or other applica ons are normally closed and open break on temperature decrease This opera on is opposite most water heaters and should only be used for auxiliary equipment Set the tempe...

Page 13: ... all other zones will stop opera on un l zone 6 is sa s ed When Zone 6 is not switched to priority all zones will operate independently Jumper Placement REMOVE the jumper between terminals ZC and ZR Connect termi nal ZC to ZC terminal on the aquastat control Connect terminal ZR to ZR terminal on the aquastat control Con rm polarity is con sistent between the boiler aquastat and the switching relay...

Page 14: ...ed to the priority se ng and is ac vat ed all other zones will stop opera on un l zone 6 is sa s ed When Zone 6 is not switched to priority all zones will operate independently Jumper Placement The jumper should be placed between terminals ZC and ZR Con nect the isolated end switch to the aquastat on the boiler Power input Connect 120 volt as power input to terminals N and H Neutral wire to termin...

Page 15: ...Wiring Diagrams 15 ...

Page 16: ...Wiring Diagrams 16 ...

Page 17: ...t water taps 4 A ach a hose to the drain valve located at the bo om of the heater and allow the heater to drain 5 Unscrew the anodes EXAMINE THE ANODES AND REPLACE IF THEY SHOW SIGNS OF DETERIORATION 6 Replacement of the Anodes The use or P T F E tape is recommended to ensure water ght connec on of the anodes Failure to inspect the anodes may result in premature failure of the heater and could voi...

Page 18: ...ium indirect fired water heater services only one family unit in a multiple family dwelling provided that the term residential setting shall not include any usage of the Techtanium indirect fired water heater above 150 degrees Fahrenheit During the specified warranty period of the indirect fired water heater Diversified Heat Transfer Inc will repair or replace at its option without charge any indi...

Page 19: ...da 12 Service calls not involving any malfunction or defects and maintenance in the ordinary course 13 Components of an indirect fired water heater which are not manufactured expressly for Diversified Heat Transfer such components are subject only to those warranties if any given by their manufacturers Diversified Heat Transfer does not adopt and has no responsibility for those warranties 14 Any T...

Page 20: ... to the model and dimensions in the diagrams below When fastening the brackets to the wall make sure to use appropriate fasteners capable of suppor ng the full tank weight as speci ed below Please note that the tank may only be installed in the upright ver cal posi on Follow the piping and wiring instruc ons found in the installa on manual Optional Wall Mount Installation Instructions Models MP 20...

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