LAARS Mighty Therm PH (Sizes 500-1825) - Installation, Operation and Maintenance Instructions - Manual (Page 28)

Pump Rotating Sections and Repair Parts
Electrical Options
Automatic Reset Temp. Limit Switch ....................................................................................................................... E0014400
Manual Reset High Gas Pressure Switch ............................................................................................................... E0023300
Manual Reset Low Gas Pressure Switch ................................................................................................................ E0023500
Outdoor Reset, On/Off 1:1 Reset Ratio .................................................................................................................. E0067600
Outdoor Reset, Two Stage, 1:1 Reset Ratio ........................................................................................................... E0084200
Outdoor Reset, Two Stage, 1:1.5 Reset Ratio ........................................................................................................ E0081900
Low-water Cut-off, Electronic, Manual Reset .......................................................................................................... E2075100
Gas valve types and sizes vary with different boiler models, with different fuels and with different firing options. For service and replacement,
copy exact number from nameplate giving manufacturer’s name and pipe size.
Energy Management Monitor (EM 2 )
STANDARD COMPONENTS
Description Part No.
On/Off Auto Switch E0109200
Time Delay Relay, 24 VAC E2077700
OPTIONAL EQUIPMENT
Description Part No.
Remote Aquastat, 110-240F E0014400
Immersion Well E0025900
Note: The Remote Aquastat and the Immersion Well, when
required, should be ordered separately.
SECTION 8. Optional Parts Descriptions and Order Numbers
H0117400E
Standard PH Model Pumps (Armstrong 1050)
PH Model Part Number Description
500-850 A2000700 1/3 hP with 3-1/2" Impeller
1010-1200 A2000800 1/2 hP with 4-1/4" Impeller
1430-1670 A2000900 3/4 hP with 5-1/4" Impeller
Optional PH Model Pumps (B&G 1522)
PH Model Part Number Description
500-715 A0048600 1/4 hP with 3-1/2" Impeller
850-1010 A0047100 1/3 hP with 4" Impeller
1200-1825 A0047300 3/4 hP with 5-1/4" Impeller
Standard Pump Replacement Parts
(for standard Armstrong 1050 pumps only)
Description Part Number
Coupler Assembly A2010500
Shaft & Bearing Module A2010100
Mechanical Seal Assembly A2010000
Impeller for A2000700 (3-1/2") A2010200
Impeller for A2000800 (4-14") A2010301
Impeller for A2000900 (5-1/4") A2010302
Motor Assembly A2010303
800.900.9276 • Fax 800.559.1583 (Customer Service, Service Advisors)
20 Industrial Way, Rochester, NH 03867
• 603.335.6300 • Fax 603.335.3355
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com Litho in U.S.A. © Laars Heating Systems 0805 Document 1049E