Competitive Cross Reference

Manufacturer Taco Hydrolevel Hydrolevel Hydrolevel Hydrolevel
McDonnell &
Miller
McDonnell &
Miller
McDonnell &
Miller
McDonnell &
Miller
Model LF 400 & 450
CG400, CG450 &
CGT450
500 & 550 ** 700 & 750 PS-801 & PS-802 PSE-801 & PSE-802 PS-851 & PS-852 750
Input
Power
24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC 24 & 120 VAC
Contact
Rating
50VA @ 24VAC
7.5FLA @ 120VAC
43.2LRA@120VAC
50VA @ 24VAC
5.8FLA @ 120VAC
34.8LRA@120VAC
50VA @ 24VAC
5.8FLA @ 120VAC
34.8LRA@120VAC
50VA @ 24VAC
5.8FLA @ 120VAC
34.8LRA@120VAC
50VA @ 24VAC
5.8FLA @ 120VAC
34.8LRA@120VAC
50VA @ 24VAC
7.5FLA @ 120VAC
43.2LRA@120VAC
50VA @ 24VAC
7.5FLA @ 120VAC
43.2LRA@120VAC
50VA @ 24VAC
7.5FLA @ 120VAC
43.2LRA@120VAC
50VA @ 24VAC
7.5FLA @ 120VAC
43.2LRA@120VAC
Ambient Temp 20° - 150° F Room 32 -100° F Room Room 32 - 120° F 32 - 120° F 32 - 120° F 32 - 135° F
Water Temp 250° F Not Available Not Available Not Available Not Available 250° F 250° F 250° F 250° F
Water Pressure 250 psi Steam only Steam Only 200 psi 200 psi 160 psi 160 psi 160 psi 160 psi
SteamPressure 15 psi 15 psi 15 psi 15 psi 15 psi 15 psi 15 psi 15 psi 15 psi
Reset Type
Manual &
Automatic
Automatic Automatic Manual Manual
Manual &
Automatic
Manual &
Automatic
Manual &
Automatic
Manual &
Automatic
Testable Yes No No Yes No Yes Yes Yes Yes
Foam
Compensating
Patented DualVi-
sion Technology
None
Patented Intermit-
tent Level Test (ILT)
None None None
Patented Resistance
Measurements
None None
Delays Automatic
15 sec. DOB,
30 sec. DOM
ILT frequency
every 10, 20 or 50
minutes, duration
of 60 or 90 sec. (1)
30 sec. DOB 30 sec. DOB
10 sec. DOB,
15 sec. DOM
Delay on Break
of 10 sec. and Delay
on Make of 30 sec.
None None
Alarm Option Yes No No Yes Yes Yes Yes No Yes
LED Indicators
Power / Low H
2
0 &
Service
Low H
2
O
Low H
2
O & ILT
Activated
Power & Low H
2
O Power & Low H
2
O
Low H
2
O / Shorted
Probe & Power / Test
Power & Low H
2
O
Low H
2
O / Shorted
Probe & Power
/ Test
Power & Low H
2
O
Service Hot Water, Steam Steam Steam
Hot Water,
Secondary Steam
Hot Water,
Secondary Steam
Steam Steam
Hot Water,
Secondary Steam
Hot Water,
Secondary Steam
(Manual reset)
Max. Probe
Sensitivity
40K ohms 7k ohms 7k ohms 7k ohms Not Available 7k ohms 7k ohms 7k ohms 20k ohms
Process Connection 1/2” or 3/4” 1/2” or 3/4” 1/2” or 3/4” 1/2” or 3/4” 1/2” or 3/4” 3/4” 3/4” 3/4” 3/4” Remote
Probe Style Standard (1.31”)
Standard
(3-7/8”)
Standard*
(3-7/8”)
Standard
(3-7/8”)
Standard
(3-7/8”)
Short *
(1-3/8”)
Standard*
(2-1/8”)
Self Cleaning
Standard*
(2-1/8”)
Self Cleaning
Standard (2-1/8”)
Self Cleaning
Remote Probe
Option
Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1) Yes (NEMA 1)
Extended Probe
Option
Yes (NEMA 1 & 4) No No No No No No No Yes (4.5-36”)
24VAC Wire
Harness Connector
Yes
(LFx024xx
model only)
Yes
(400 only)
Yes
(400 only)
No No
Yes
(PS-802-24)
Yes
(PSE-802-24)
Yes
(PS-852-24)
No
Listing /
Approvals
UL GUIDE (MBPR)
for Limit Controls
per UL Standard
353 Limit Controls
UL GUIDE (MBPR7)
Limit Controls
Certied for
Canada per CSA
Standard C22.2
Fully meets installa-
tion requirements
of CSD-1 for
automatic and
manual controls
24 VAC model
meets
ANSI Z21.13a
specication
UL GUIDE (MBPR)
for Limit Controls
per UL Standard
353 Limit Controls
UL GUIDE (MBPR7)
Limit Controls
Certied for Canada
per CSA Standard
C22.2
24 VAC model
meets ANSI
Z21.13a
specication
UL GUIDE (MBPR2)
for Limit Controls-
Components per
UL Standard 353
Limit Controls
UL GUIDE (MBPR8)
Limit Control Com-
ponents Certied
for Canada per CSA
Standard C22.2
24 VAC
model meets
ANSI Z21.13a
specication
UL GUIDE (MBPR) for
Limit Controls per UL
Standard 353 Limit
Controls
UL GUIDE (MBPR7)
Limit Controls
Certied for Canada
per CSA Standard
C22.2
Fully meets
installation
requirements
of CSD-1
UL GUIDE (MBPR) for
Limit Controls per UL
Standard 353 Limit
Controls
UL GUIDE (MBPR7)
Limit Controls
Certied for Canada
per CSA Standard
C22.2
Fully meet
installation
requirements
of CSD-1
UL GUIDE (MBPR) for
Limit Controls per UL
Standard 353 Limit
Controls
CSA 4813-02
FM Approved
24 VAC model
meets ANSI Z21.13a
specication
UL GUIDE (MBPR) for
Limit Controls per UL
Standard 353 Limit
Controls
CSA 4813-02
24 VAC model
meets ANSI Z21.13a
specication
UL GUIDE (MBPR)
for Limit Controls
per UL Standard
353 Limit Controls
CSA 4813-02
FM Approved
UL GUIDE (MBPR)
for Limit Controls
per UL Standard 353
Limit Controls
CSA 4813-02
FM Approved
Manual reset
models meet
installation
requirements
of CSD-1
Notes
--- --- *Extended 3/4”
barrel model
available. CGT 450
has additional
terminals to sup-
port domestic hot
water applications.
Has a non replaceable
fuse in the burner
circuit for overload
protection
--- *Extended barrel
models available
*Extended barrel
models available
*Extended barrel,
remote and short
(1-3/8”) probe
models available
Requires the
purchase of a
separate remote
probe like the
RS-1-RB-1, RS-1-HP
or RS-1-LP
LF Competitive Comparison
** In November of 2010 Hydrolevel issued Field Technical Bulletin No. 111910 which stated, “Hydrolevel Company has discovered the potential for nuisance lock-outs resulting from power outages on many 500 and 550 Series low water cut-os produced in 2010.
The 55/550 Series low water cut-os includes a feature to prevent such lock-outs from occurring. However, a problem with the a circuit board component has resulted in inconsistent operation of this feature. The problem was not discovered in production line
testing as it can only occur in power outages exceeding 8 seconds - longer than the test parameter.” The eected items had date codes from March 15, 2010 - October 19, 2010. Hydrolevel recommended that any unit with that date code be replaced.
(1) Hydrolevel CG Model Sux Reference Table
Models Ending In Run Time Test Time
1090 10 Min. 90 Sec.
1560*** 50 Min. 60 Sec.
2060 20 Min. 60 Sec.
2090*** 20 Min. 90 Sec.
*** These models are not on their standard price sheet, may be custom OEM models.
There is also a 30 second on-time delay on all CG models to allow solenoid valves and water feeders to bring feed water past the probe to a safe operating level. Plus an additional 30 second
delay once water reaches the probe. There is a 15 second o-time delay in a low water condition to help prevent burner short cycling due to surging and priming.
(2) Shuts down the burner when water drops below the probe for 2 seconds. Requires manual reset if the water level remains below the probe for 30 seconds
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