SECTION TWO – Heater Installation
The heater can be used to heat either pools or spas. A
typical installation is shown above.
NN
NN
OO
OO
TT
TT
EE
EE
that the heater is downstream from the filter.
Also, the Chemical Feeder (Sanitizer) should be
installed as far downstream from the heater as possible.
Keep the number of elbows and fittings in the plumb-
ing to a minimum.
Install a chemical resistant, positive stop check valve
between the heater and the chemical feeder.
Pool/Spa Sizing
The Sta-Rite heater is available in three input ratings:
MM
MM
oo
oo
dd
dd
ee
ee
ll
ll
RR
RR
aa
aa
tt
tt
ii
ii
nn
nn
gg
gg
• SR/SRC200NA, SR/SRC200LP 200,000 BTUs/Hr
• SR/SRC333NA, SR/SRC333LP 333,000 BTUs/Hr
• SR/SRC400NA, SR/SRC400LP 400,000 BTUs/Hr
• SR400HD 400,000 BTUs/Hr
Use the tables below to determine the correct model
size for a particular pool or spa.
2-2
Typical Installation
Figure 2-1: Typical Installation
Table 2-A: Maximum Pool Size in Sq. Ft. for a
Given Model Heater and a Given
Temperature Rise/24 Hr.
Table 2-B: Minutes For 30° F (11.4° C)
Temperature Rise
MODEL NUMBER
Temp. SR400NA
Diff. SR200NA SR333NA SR400LP
°F (C°) SR200LP SR333LP SR400HD
15 (8.3) 400 700 900
20 (11.1) 350 550 700
25 (13.9) 250 450 550
30 (16.7) 200 350 450
35 (19.4) 200 300 400
MODEL NUMBER
Spa SR400NA
Size SR200NA SR333NA SR400LP
Gal.(L) SR200LP SR333LP SR400HD
200 (757) 18 11 9
300 (1,136) 27 16 13
400 (1,514) 35 21 18
500 (1,893) 44 27 22
600 (2,271) 53 32 27
700 (2,650) 62 37 31
800 (3,028) 71 43 35
900 (3,407) 80 48 40
1,000 (3,785) 89 53 44
Recommended models for pools.
Recommended models for spas.