Laars mascot ft MFTHW Installation And Operation Instructions Manual page 41

Mascot FT, Heating Only, Boiler
M
ascot FT, Heating Only, Gas Conversion Kit
4.13 Natural Gas to Propane Conversion (continued)
ON
MIN Fire
MAX Fire
NG Natural
3" Vent Size
ON OFF
OFF ON
OFF OFF
MBH 80 100
Table B DIP Switch Settings
9.
Per Table B, set DIP Switch
10.
Turn ON the GAS and WATER supply to the Mascot FT.
11.
Turn ON the Mascot FT.
12.
Connect a manometer to the manifold pressure port. For dual port manometers, use the positive pressure
side. Check for proper manifold gas pressure. Refer to Table C.
CO
2
Manifold Pressure Port
MFTHW 80/100
CO
2
120/140/175/199
MFTHW 80/100
120/140/175/199
Refer to the below table.
Refer to the below table. Manifold pressure
Gas Valve for
MFTHW 80/100
Manifold pressure
MFTHW 120/140
MFTHW 80/100
MFTHW 175
MFTHW 120/140
MFTHW 175
MFTHW 199
Table C
MFTHW 199
13.
Establish a call for heat. You may need to disconnect the outdoor reset if you are making this gas
conversion during warm weather.
OFF
Normal Operation
Normal Operation
LP Propane
2" Vent Size
ON OFF ON
ON
ON OFF OFF
ON
OFF ON ON
ON
120 140 N/A 199
5 to OFF
for LP Propane.
value
value Figure D
The gas valve on
the smaller models is
mounted vertically.
80 to 140 MBH
Customer Service and Product Support:
800.900.9276 • Fax 800.559.1583 20
Headquarters:
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
1869 Sismet Road, Mississauga, Ontario, Canada L4W 1W8 • 905.238.0100 • Fax 905.366.0130
www.Laars.com
www.Laars.com
Figure C
Propane Gas (LP)
2˝ VENT 3˝ VENT
9.5~11%
Propane Gas (LP)
2˝ VENT 3˝ VENT
9~10.5 %
9.5~11%
9~10.5 %
Propane Gas (LP)
-0.102˝ WC
Propane Gas (LP)
0.00˝ WC
-0.216˝WC
-0.102˝ WC
0.00˝ WC
0.00˝ WC
-0.169˝ WC
-0.216˝WC
-0.015˝ WC
0.00˝ WC
-0.169˝ WC
-0.173WC
-0.015˝ WC
-0.015˝ WC
-0.173WC
-0.015˝ WC
Industrial Way, Rochester, NH, USA 03867 • 603.335.6300 • Fax 603.335.3355
(Customer Service, Service Advisors)
Litho in U.S.A. © Laars Heating Systems 1607 Document 4296B
Document 4296B
Natural Gas (NG)
2˝ VENT 3˝ VENT
Manifold Pressure Port
8.5~10.5%
Natural Gas (NG)
2˝ VENT 3˝ VENT
8~10%
8.5~10.5%
8~10%
Natural Gas (NG)
199 MBH
Gas Valve for
-0.102˝ WC
Natural Gas (NG)
0.00˝ WC
-0.216˝WC
-0.102˝ WC
0.00˝ WC
0.00˝ WC
-0.129˝ WC
-0.216˝WC
-0.015˝ WC
0.00˝ WC
-0.129˝ WC
-0.134˝ WC
-0.015˝ WC
-0.015˝ WC
-0.134˝ WC
-0.015˝ WC
800.900.9276 • Fax 800.559.1583
(Applications Engineering)
Page 39
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