Crown Boiler MAXI-THERM MT040G Installation And Operating Instructions Manual Download Page 1 | Manualshive

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Tel: (215) 535-8900 • Fax: (215) 535-9736 • www.crownboiler.com

Manufacturer of Hydronic Heating Products

P.O. Box 14818 3633 I. Street

Philadelphia, PA 19134

MAXI-THERM

Glass Lined Indirect Water Heater

INSTALLATION AND OPERATING INSTRUCTIONS

WARNING

: Improper installa-

tion, adjustment, alteration,
service or maintenance can
cause property damage, injury,
or loss of life. For assistance or
additional information, consult a
qualified installer or service
agency. Read these instructions
carefully before installing or
using.

Models:

•

MT040G

•

MT050G

•

MT079G

•

MT100G

1
2
3
...
»

Summary of Contents for MAXI-THERM MT040G

Page 1: ...Glass Lined Indirect Water Heater INSTALLATION AND OPERATING INSTRUCTIONS WARNING Improper installa tion adjustment alteration service or maintenance can cause property damage injury or loss of life...

Page 2: ...Residential 5 Detailed Residential 6 Commercial 9 Zone Design 15 IV Before Starting Installation 18 V Locating the Maxi Therm 18 VI Piping 20 Boiler Side 20 Domestic Side 24 VII Wiring 30 VIII Start u...

Page 3: ...cal authority having jurisdiction before installing an MT079G or MT100G with a boiler having a total gross output in excess of 200 000 BTU hr 2 MT040G MT050G MT079G MT100G FIRST HOUR RATING Gal hr 192...

Page 4: ...3 Figure 1b MT079G and MT100G General Configuration Figure 1a MT040G and MT050G General Configuration...

Page 5: ...RIETY OF DEMAND SITUATIONS ENCOUNTERED IN THE FIELD CROWN BOILER COMPANY CANNOT GUARANTEE THE SUITABIL ITY OF THESE PROCEDURES TO ALL INSTALLATIONS Three steps must be taken to properly design a Crown...

Page 6: ...If a new boiler is to be installed with the Maxi Therm first find a boiler that will handle the space heating load alone If this boiler has an output GREATER than that shown in column f do not add any...

Page 7: ...Install the Maxi Therm with a boiler having the larger of these two outputs 6 If the Maxi Therm is to be installed with an existing boiler a Go to Table 1 and select a Maxi Therm which has a 135F Fir...

Page 8: ...2 000 BTU hr output a b c d Shower 3 GPM Head 21 0 X 5 GPM Head 35 0 X 7 GPM Head 49 0 X Bath 30 Gal Tub 21 0 X Vanity 2 8 X Clothes Washer 48 0 X Dishwasher 15 0 X BTU hr BTU hr 1 Boiler Output Requi...

Page 9: ...Therm 2 Boiler Output Required for Space Heating Select a boiler with an Output equal to 1 or 2 whichever is GREATER 10 0 Peak Hour Demand Total Column d Peak Hour Demand X 1 20 Adjusted Peak Demand K...

Page 10: ...usage pattern Consult the machine manufacturer and the building owner for this information Once the maximum hourly usage is known for this equipment enter it in the spaces provided under Column 3 g Ad...

Page 11: ...Crown does not recommend the use of a Maxi Therm to generate 180F water for commercial dishwashers Use the Maxi Therm to generate 135F water and a pre heater to raise the water temperature for the di...

Page 12: ...Fixtures in Various Types of Buildings 1 2 3 Fixture Description Basins Private Lavatory X Basins Public Lavatory X Bathtubs X Showers X Circular Wash Sinks X Semi Circular Wash Sinks X Foot Basins X...

Page 13: ...ial Kitchen Fixtures Vegetable Sink 45 X Single Pot Sink 30 X Double Pot Sink 60 X Triple Pot Sink 90 X Bar Sink 30 X 1978 X 0 25 494 5 0 100 594 5 Adjusted Probable Maximum Demand WORKSHEET 2 COMMERC...

Page 14: ...000 200000 BOILER OUTPUT BTU hr FIRST HOUR RATING GAL hr Figure 4c MT079G Ratings at Different Boiler Outputs 0 50 100 150 200 250 0 50000 100000 150000 BOILEROUTPUT BTU hr FIRST HOUR RATING GAL hr Fi...

Page 15: ...3 MT100G Time min Ind Ind 10 6 8 4 5 7 4 0 200038 Gallons 79 3 75 2 68 1 59 4 Notes 2 Gallons The total volume of water drawn from the tank during this time 4 All valves shown are approximate 3 Ind D...

Page 16: ...e fitting pressure drops in column 2 For MT079G and MT100Gs use the fitting pressure drops in column 3 c For each fitting multiply the quantity of the fitting in column 1 by the appropriate pressure d...

Page 17: ...Std Ball Valve 0 12 0 19 1 1 4 Std Ball Valve 0 06 0 09 1 1 2 Std Ball Valve 0 02 0 03 Taco Flo Chek 220 1 2 18 3 41 220 1 1 4 0 84 1 31 222 1 1 2 0 44 0 69 Taco Air Scoop 431 1 0 15 0 23 432 1 1 4 0...

Page 18: ...e 0 01 0 02 1 Branch in Tee 0 26 0 41 1 1 4 Branch in Tee 2 0 08 0 13 0 16 1 1 2 Branch in Tee 0 05 0 08 1 Std Ball Valve 0 12 0 19 1 1 4 Std Ball Valve 0 06 0 09 1 1 2 Std Ball Valve 0 02 0 03 Taco F...

Page 19: ...es Also note that some jurisdictions may not permit the installation of an MT079G or MT100G with a boiler having a gross output in excess of 200 000 BTU hr Consult the authority having jurisdiction be...

Page 20: ...rther the Maxi Therm is from the boiler the longer the response of the boiler will be to a call from the Maxi Therm zone If long runs exist between the boiler and Maxi Therm it is advisable to insulat...

Page 21: ...of prioritizing the Maxi Therm In this system a 3 way zone valve is used which has a common port a normally open port and a normally closed port The zone valve motor is wired so as to be energized by...

Page 22: ...Figure 6 Boiler Side Piping Using Circulator Zones Figure 7 Boiler Side Piping Using Zone Valves 2 Way 21...

Page 23: ...may be controlled through the use of an aquastat in the low temperature side Figure 10 illustrates the use of a 4 way valve to control maximum heating zone temperature while allowing 180F boiler water...

Page 24: ...23 Figure 9 Boiler Side Piping in a Low Temperature System Using a Heat Exchanger Figure 10 Boiler Side Piping in a Low Temperature System Using a Mixing Valve...

Page 25: ...red by some codes Use to prevent water from backing out of the Maxi Therm in the event that inlet water pressure drops d Expansion Tank required when a backflow preventer is used This expansion tank a...

Page 26: ...This Valve must comply with the Standard for Relief Valves and Automatic Gas Shutoff devices for Hot Water Supply Systems ANSI Z21 22 No valve is to be placed between the T P valve and the Maxi Therm...

Page 27: ...low towards the Maxi Therm inlet only When no fixtures are drawing water the bronze circulator moves hot water from the Maxi Therm to end of the branch just below the last fixture then back to the inl...

Page 28: ...Figure 12 Basic Domestic Side Piping Figure 13 Domestic Side Piping Using a Mixing Valve 27...

Page 29: ...Figure 14a Domestic Side Piping Using a Recirculation Line MT040G MT050G 28 Figure 14b Domestic Side Piping Using a Recirculation Line MT079G MT100G Insulate dashed piping Insulate dashed piping...

Page 30: ...Figure 15 Domestic Side Piping for Multiple Maxi Therms 29...

Page 31: ...center consists of a DPDT relay and a 24 volt transformer The Maxi therm control is connected to terminals R and G so that when the Maxi therm control calls for heat the relay is energized One set of...

Page 32: ...Figure 16 Non Priority Circulator Zoning Using Honeywell R845a s Figure17 PriorityCirculatorZoning 31...

Page 33: ...become made which energizes the Maxi Therm zone valve The Maxi Therm zone valve opens and its endswitch brings on the boiler If four or fewer zones including the Maxi Therm zone are present the transf...

Page 34: ...3 Figure 19 ZoneValve Wiring 2 Way Priority Note Connect Zone Valve Port A to Maxi Therm Port B to Heating Zone AB to boiler return Figure 20 Zone Valve Wiring 3 Way Priority Using Honeywell V8044E110...

Page 35: ...wiring is present 4 Turn off the burner 5 Make sure that each zone valve or circulator operates when and only when its thermostat calls for heat Let each zone operate long enough to purge any remaini...

Page 36: ...ion This anode rod should be inspected periodically and replaced if more than half of the anode has been corroded away at any point in its length The rate at which the anode rod will deteriorate will...

Page 37: ...Have the maintenance outlined in Part IX of this manual preformed on an annual basis Also make sure that the boiler is maintained in accordance with its manufacturer s instructions 2 If the temperatur...

Page 38: ...0000 1 4 O U T ER G A SK ET 220001 1 5 IN N ER G ASK ET 220002 1 6 M 10 x 30m m CARRIA G E B O LT 900023 6 7 M 10 FLAT W ASH ER 90 024 6 8 M 10 H EX N U T 90 025 6 9 CAP 220020 1 9a CAP IN SU LA T IO...

Page 39: ...005 1 4 CLEAN OUT GASKET 220006 1 5 M12 x 30mm CAP SCREW 900020 8 6 ANODE ROD MT079G 220011 1 6 ANODE ROD MT100G 220012 1 7 JACKET WRAPPER MT079G 220079 1 7 JACKET WRAPPER MT100G 220100 1 8 TOP INSULA...

Page 40: ...rlpool tub no significant amount of hot water may be used for other purposes while the whirlpool is filling or for a period equal to the recovery time before the whirlpool is filled Also hot water may...

Page 41: ...Tel 215 535 8900 Fax 215 535 9736 www crownboiler com Manufacturer of Hydronic Heating Products P O Box 14818 3633 I Street Philadelphia PA 19134 Rev 2 05 03...

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