Laars NTH, Installation And Operation Instructions Manual

Page: 84 / 96

Page 80
LAARS Heating Systems
SIZE SIZE SIZE SIZE SIZE SIZE SIZE SIZE
ITEM DESCRIPTION NTH 150 NTH 210 NTH 285 NTH 399 NTH 500 NTH 600 NTH 750 NTH 850
NTV 150 NTV 199 NTV 285 NTV 399 NTV 500 NTV 600 NTV 750 NTV 850
28 Heat Exch. Rail Clip — — R50D1006 — — — — —
(2)
30 PVC Reducer RP2053000 RP2053000 RP2052900 RP2052800 50D4027 RP2052800 RP2052800 RP2052800
30a CPVC Reducer RP2065600 RP2065600 — — — — R75D4020 R75D4020
or Coupling
30b 2” Dia. Pipe, CPVC RD2010213 RD2010213 — — — — — —
NTV
RD2010213
NTH
31 Hose Barbed Adapter RP2056100 RP2056100 RP2056100 — — — — —
33 Air Inlet/Exhaust Bracket R20D3120 R20D3120 30D3505 40D3005 85D3005 85D3005 85D3005 85D3005
Gas Train Components –
See Parts Illustration 5 and Parts Illustration 6
40 Combustion Air Blower RA2107500 RA2114200 RA2114200 RA2113100 RA2113100 R2012101 R2012101 R2012101
41 Gas Valve/Venturi RV2017902 RV2017903 RV2017904 — — — — —
42 Gas Valve — — — RV2019200 V2019600 V2018500 V2018500 V2018500
43 Gas/Air Venturi — — — — RA2116700 A2115000 A2115000 A2115000
44 Manual Gas Valve — — — RV2000200 V2003000 V2003000 V2003200 V2003200
(2)
44A Manual Gas Valve — — — — RV2000200 — V2003000 V2003000
45 Gas Valve Flange Kit — — — — RP2050100 RP2050100 RP2050100 RP2050100
46 Gas Valve/Venturi — — — — RS2104900 RS2104900 RS2104900 RS2104900
Cork Gasket
47 Gas Valve O-Ring R30-227 R30-227 R30-227 — — — — —
48 Venturi O-Ring — — — RS2105200 RS2105200 RS2105200 RS2105200 RS2105200
49 High Gas Pressure Switch — — — — R50D5014 R50D5013 R75D5014 R75D5014
50 Low Gas Pressure Switch — — — — R50D5015 R50D5012 R75D5015 R75D5015
51 Duct/Venturi Transition R10D5021 R10D5013 R30D5013 — R50D5017 R60D5052 R60D5052 R85D5052
52 Gas Supply Pipe RP2051400 RP2051400 RP2051500 P2054300 P2054300 P2054300 P2064200 P2064200
53 Gas Pipe, 3/4” NPT — — — RP2056500 — — — —
Formed Nipple
55 Air Inlet Flex Hose RD0091403 D0091401 D0091401 RD0091202 D0091301 RD0091201 RD0091203 RD0091203
56 Air Inlet Collector — — — RV2019400 — — — —
57 Electrical Connector w/Cable — — — RE2331700 RE2331700 — — —
58 Elbow Adapter — — — RV2019300 RV2019300 —
59 Blower Gasket W/Fasteners — — — — — RS2107500 RS2107500 RS2107500
Heat Exchanger Components –
See Parts Illustration 7
60 Heat Exchanger, NTH RS2105800 RS2105700 RS2111100 RS2111200 RS2111300 RS2111300 RS2111400 RS2111500
Heat Exchanger, NTV S2111000
61 Pump Assembly R10D4110 R20D4140 R30D4110 R40D4110 R50D4110 — — —
NTH NTH NTH NTH NTH
15D4040 50D4040 50D4040 50D4040
NTV NTV NTV NTV
62 Low Water Cutoff Switch — — — — RE2076500 RE2076500 RE2076500 RE2076500
63 Inlet Water Temp Sensor RE2320600 RE2320600 RE2320600 RE2320600 RE2320600 RE2320600 RE2320600 RE2320600