Specifications

Description Part #
Condensate Neutralizer Kit 101876-01
80# Relief Valve Kit 102207-01
100# Relief Valve Kit 102212-01
Tekmar 265 3-Boiler Modulating Control 6016088
Optional Equipment
Dimensions and Specifications
MODEL
RATINGS
I=B=R
NET
RATING
WATER
(MBH)
THERMAL
EFFICIENCY
GAS
CONNECTION
WATER
CONTENT
(Gal.)
APPROX.
SHIPPING
WEIGHT
(Lbs.)
HEAT
TRFR.
AREA
(SQ. FT.)
INTAKE &
VENT
DIA.
SUPPLY
&
RETURN
CONNECTIONS
MIN.
INPUT
(MBH)
MAX.
INPUT
(MBH)
GROSS
OUTPUT
(MBH)
APX399 80
399
377 328 95%
3/4" NPT
3.4 304 41.8 4" 1-1/2" NPT
APX500 100
500
475 413 95%
3/4" NPT
4.2 375 50.8 4" 1-1/2" NPT
APX800 160
800
760 661 95%
1" NPT
5.0 430 65.3 6" 2" NPT
LEFT SIDE
©2010 Burnham Commercial
P.O. Box 3939, Lancaster, PA 17604
Phone: [phone]
www.burnhamcommercial.com
Description Part #
High and Low Gas Pressure Switch Kit 102772-01
Hydrolevel 550 M.R. LWCO w/ Test Button 80160641
M&M 750P-M.R. LWCO w/ Test Button 80160718
Honeywell L4006E Manual Reset High Limit 80160703
CSD-1 Equipment
Low voltage
knockouts
(24V)
F
Gas valve
inlet
H
Supply
tapping
Condensate
trap drain
M
N
O
Line voltage knockouts (115V)
A
B
C
D
E
G
FPT Return
Tapping
H
I
K
L
P
Access panel
Access panel
Model
A B C D E F G H I K L M N O P
APX399 28-7/8" 6-13/16" 13-11/16" 23-3/4" 15-13/16" 3/4" 1-1/2" 1-1/2" 12-1/4" 5" 8-5/16" 43-7/16" 17-5/16" 32-7/16" 16-11/16"
APX500 44-7/8" 22-1/8" 29" 39-11/16" 29-3/8" 3/4" 1-1/2" 1-1/2" 12-1/4" 5" 7-7/16" 35" 17-5/16" 14-29/32" 16-11/16"
APX800 54-9/10" 28-3/8" 34-1/4" 48-1/16" 33-3/16" 1" 2" 2" 12-1/4" 5" 7-1/2" 35" 17-1/4" 7-1/4" 16-11/16"
Dimensions
Specifications & Ratings
FRONT
Apex Boiler Control System
Accepts 20mA for External Staging
Built-in Outdoor Reset & Domestic Priority
Built-in Diagnostics
Touchscreen Display
Standard Equipment
Natural Gas Only
Compact, Service Friendly Design
50 PSI Relief Valve (399/500)
60 PSI Relief Valve (800)
80 PSI and 100 PSI are optional on all models
Simple Layout & Wiring
Low Voltage Terminal Strip
Negative Pressure Lower Cabinet
Sealed Control Compartment
Slide-Out Control Panel
Built-In LIfting Handles
100' Equiv. Ft. Lengths for Combination Air & Vent Pipes