Zehnder Rittling RW Series Installation and operating instructions

Installation, Operations and Maintenance
Rittling
Cabinet Unit Heater
Hydronic Heating Radiant Ceiling Systems

With Zehnder, you will find the perfect
climate for any space. www.zehnder-systems.com
IMPROVED
QUALITY OF LIFE
Zehnder decorative radiators
Comfortable indoor ventilation
Heating and cooling ceiling systems
Clean air solutions

IMPORTANT: Submittal
documentation, specific to each
project, supersedes the general
guidelines contained within this
manual.
Models and arrangements 2
Ratings 4
Dimensions and data 6
General information 13
Receiving 13
Safety considerations 14
Unpacking and preparation 15
Handling and installation 16
Hot water connections 17
Ductwork connections 18
Electrical connections 19
Wiring diagram 20
Start-up 22
Air system balancing 23
Heating system 23
Water system balancing 24
Water treatment 24
Controls operation 25
Exposed unit touch-up 25
Normal operation/maintenance 26
Replacement parts 28
Equipment start-up checklist 28
Warranty 30
1

Models and airflow arrangements
Wall models
RW-260
RWI-290
RW-280
RWI-310
RW-270
RWI-300
RW: Wall
RW-260 shown
RW-270 and RW-280 available
RWI: Wall, inverted flow
RWI-290 shown
RWI-300 and RWI-310 available
RRW-320
RRW: Wall, partially recessed
RRW-320 shown
RRWI-330
RRWI: Wall, partially recessed, inverted flow
RRWI-330 shown
RFRW-340
RFRW: Wall, fully recessed
RFRW-340 shown
RFRWI-350
RFRWI: Wall, fully recessed, inverted flow
RFRWI-350 shown
MODELS AND ARRANGEMENTS
2

Models and airflow arrangements
Floor models Ceiling models
RC-360
RC-370
RC-380
RFRC-410
RC-390
RFRC-420
RC-400
RFRC-430
RRC-400
RF-200 RF-220
RF: Floor
RF-200 shown, RF-220 available RC: Ceiling
RC-360 shown
RC-370, RC-380, RC-390 and
RC-400 available
RFI-240 RFI-250
RFI: Floor, inverted flow
RFI-240 shown, RFI-250 available
RS-200
RS: Floor, sloped
RS-200 shown
RRC: Ceiling, partially recessed
RRC-440 shown
RFRC: Ceiling, fully recessed
RFRC-420 shown
RSI-240
RSI: Floor, sloped, inverted flow
RSI-240 shown
3

Standard ratings and specifications
Table A
Specifications 02 03 04 06 08 10 12
Steam capacity MBH 18.7 25.5 34.8 51.0 62.8 73.4 90.7
EDR 76 104 144 212 260 304 376
Hot water capacity
(1 row coil)
MBH 16.2 22.4 30.7 45.5 54.8 64.5 80.1
GPM 1.7 2.3 3.2 4.8 5.7 6.7 8.4
WPD 0.2 0.4 0.8 2.2 0.5 0.7 1.2
Hot water capacity
(2 row coil)
MBH 25.0 34.3 47.2 69.5 86.6 101.2 125.8
GPM 2.6 3.6 4.9 7.3 9.0 10.5 13.1
WPD 0.8 1.7 3.6 9.3 2.2 3.3 5.6
CFM: standard
High 220 300 420 620 810 940 1180
Medium 150 200 310 450 600 720 875
Low 125 140 220 350 440 480 660
CFM: high static
(@ 0.2" ESP)
High 250 345 490 640 920 1020 1150
Medium 210 290 425 550 780 870 980
Low 160 230 320 420 590 660 750
Coil
FPI 12 12 12 12 12 12 12
Face area, ft2 1.25 1.67 2.08 2.92 3.33 3.89 4.58
Coil connections 1/2" Cu 1/2" Cu 1/2" Cu 1/2" Cu 1/2" Cu 1/2" Cu 1/2" Cu
Blower
Quantity 11221, 2 4 4
Diameter 5.7" 5.7" 5.7" 5.7" 5.7" 5.7" 5.7"
Width 7.5" 10.4" 7.5" 10.4" 7.5", 10.4" 7.5" 10.4"
Filter
Number 1111111
Length, in. 22 28 34 46 52 60 70
Width, in. - standard 9.75 9.75 9.75 9.75 9.75 9.75 9.75
Width, in. - floor with inlet grille 7.25 7.25 7.25 7.25 7.25 7.25 7.25
Rating Merv 4 Merv 4 Merv 4 Merv 4 Merv 4 Merv 4 Merv 4
Thickness, in. 1111111
Cabinet size
Length, in. 38.2 44.2 50.2 62.2 68.2 76.2 86.2
Width, in. 10 10 10 10 10 10 10
Height, in. - wall/ceiling 24 24 24 24 24 24 24
Height, in. - flat top floor 26.5 26.5 26.5 26.5 26.5 26.5 26.5
Height, in. - slope top floor 29.25 29.25 29.25 29.25 29.25 29.25 29.25
Shipping weight, lbs. 85 100 115 140 155 170 195
Notes
Airflows for floor mounted units with 1-row coil. Please check with factory
for adjusted outputs on other models
Heating capacity based on inlet air 60 ˚F DB, 200˚F entering water or 2 psig
steam, 180˚F leaving water, standard motor at high fan speed
Pressure drop (PD) shown in feet of water
Overall length for fully and partially recessed units is length +3", adding
in the trim kit. Wall rough-in hole dimension to be length +1/2" by 24-1/2"
minimum. Maximum opening to be length by +2" by 26".
STANDARD RATINGS
4

Table B
Motor Type 02 03 04 06 08 10 12
HP
PSC Standard 1/30 1/30 1/25 1/15 1/30, 1/15 (2) 1/15 (2) 1/15
High-Static 1/12 1/12 1/10 1/7 1/12, 1/7 (2) 1/7 (2) 1/7
ECM
Standard 1/4 1/4 1/4 1/4 (2) 1/4 (2) 1/4 (2) 1/4
High-Static 1/4 1/4 1/4 1/4 (2) 1/4 (2) 1/4 (2) 1/4
RPM High
PSC Standard 895 995 900 1150 1150 1250 1200
High-Static 1505 1510 1550 1550 1550 1550 1550
ECM
Standard 1050 1025 920 1120 1150 1250 1200
High-Static 1550 1550 1550 1550 1550 1550 1550
RPM Medium
PSC Standard 833 754 720 900 900 860 950
High-Static 1390 1320 1320 1320 1320 1320 1320
ECM
Standard 875 700 720 870 900 850 950
High-Static 1320 1320 1320 1320 1320 1320 1320
RPM Low
PSC Standard 620 575 530 710 625 650 550
High-Static 1300 1200 1000 1000 1000 1000 1000
ECM
Standard 750 600 530 685 625 640 550
High-Static 1000 1000 1000 1000 1000 1000 1000
Motor FLA 120V PSC Standard 0.60 0.60 0.68 1.13 1.73 2.26 2.26
High-Static 1.05 1.05 1.2 1.7 2.8 3.4 3.4
ECM Standard 0.92 0.84 1.12 1.70 2.85 3.04 3.58
Power Input:
Watts 120V
PSC
Standard 57 61 75 130 200 240 250
High-Static 117 120 130 180 325 368 368
ECM Standard 38 38 45 80 125 147 157
Electrical data
Notes:
Maximum circuit ampacity (MCA) =
1.25 x (FLA motor 1 + FLA motor 2 + FLA electric heat)
Maximum overcurrent protection (MOP) =
(2.25 x FLA motor 1) + FLA motor 2 + FLA electric heat
If the calculated MOP is within 10% of the next smaller available fuse size,
that fuse size shall be used. If not, the next larger fuse size above the
calulated MOP must be used.
If the selected MOP is smaller than the MCA, the selected MOP must be
increased to the next larger available fuse size above the MCA.
If the MOP is less than 15, it shall be rounded up to 15 amps. This is the
minimum fuse or circuit breaker permitted by code.
EC motor nameplate amperage indicates the motor hardware peak
amperage while the motor full load amperage (FLA) is limited by the motor’s
factory programmed operating range, programmed specifically for each unit
size. The programmed operating range is generally only a portion of the
motor hardware full potential resulting in the motor FLA being lower than
the nameplate FLA. Motor FLA will be reflected on the Cabinet Unit Heater
serial tag and should be used when sizing building electrical requirements.
ELECTRICAL DATA
5

6
Revised June 1, 2018. Zehnder Rittling periodically makes changes to the design and/or specifications of its products. As a result, the design and specifications of each product at the time of order may be different than as
described herein. Please contact Zehnder Rittling's Sales Support staff at 716-827-6510 for specific information on current design and specifications. Designs, specifications and other information contained herein are not express
warranties, which are only as expressly set forth by Zehnder Rittling in its terms and conditions of sale. The latest version of this document is available at www.zehnder-rittling.com.
Rittling Cabinet Unit Heater
Submittal Data
Zehnder Rittling · 100 Rittling Blvd. · Buffalo, NY USA 14220
T 716-827-6510 · F 716-218-2805 · [e-mail] · www.zehnder-rittling.com
© Zehnder Rittling June 2018, English, subject to change without notice
8 1/8"
2"
T
P
N
R
12 13/16"
7 1/8"
M
K
7 1/8"
2"
16 1/8"
J
L
20 13/16"
6 1/2"
16"
2, 3 & 4 row hot
water supply
water return
1 row hot
and 1 row
water return
Side view: Model RFI
steam supply
steam return
and 1 row
water supply
2, 3 & 4 row hot
1 row hot
Filter positions
RF-200
shown
RF-220
shown
(top outlet)
access section
Top view
Fan speed
section
Piping access
Outlet opening centered
6"
D
10"
1 row hot
water supply
and 1 row
steam supply
steam return
and 1 row
2, 3 & 4 row hot
water return
Side view: Model RF
position
Filter
1 row hot
water return
2, 3 & 4 row hot
water supply
Front view
(Front outlet)
A
6"
3 1/2"
3"
26 1/2"
Models RF and RFI
Dimensions and data
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
Dimensional data
Coil J K L M NP R T
2 Row 18-1/4 4-7/16 19-1/16 5-3/16 9-7/8 5-3/16 10-11/16 4-7/16
3 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
4 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
* Add 6" per extended end selection. See chart for details.
mounting slot
3/8" wd. x 1" lg.
(4 places)
Note: Inlet grille optional
Electrical
end pocket
Front view
(less front panel)
* 8" B * 8"
C
8 1/8"
2"
T
P
N
R
12 13/16"
7 1/8"
M
K
7 1/8"
2"
16 1/8"
J
L
20 13/16"
6 1/2"
16"
2, 3 & 4 row hot
water supply
water return
1 row hot
and 1 row
water return
Side view: Model RFI
steam supply
steam return
and 1 row
water supply
2, 3 & 4 row hot
1 row hot
Filter positions
RF-200
shown
RF-220
shown
(top outlet)
access section
Top view
Fan speed
section
Piping access
Outlet opening centered
6"
D
10"
1 row hot
water supply
and 1 row
steam supply
steam return
and 1 row
2, 3 & 4 row hot
water return
Side view: Model RF
position
Filter
1 row hot
water return
2, 3 & 4 row hot
water supply
Front view
(Front outlet)
A
6"
3 1/2"
3"
26 1/2"
Models RF and RFI
Dimensions and data
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
Dimensional data
Coil J K L M NP R T
2 Row 18-1/4 4-7/16 19-1/16 5-3/16 9-7/8 5-3/16 10-11/16 4-7/16
3 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
4 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
* Add 6" per extended end selection. See chart for details.
mounting slot
3/8" wd. x 1" lg.
(4 places)
Note: Inlet grille optional
Electrical
end pocket
Front view
(less front panel)
* 8" B * 8"
C
Dimensions and data Models RF and RFI
Dimensional data
Unit size AB C D
Std. 6" Ext. 6" Ext. x2
02 38-3/16 44-3/16 50-3/16 22-3/16 24 20
03 44-3/16 50-3/16 56-3/16 28-3/16 30 26
04 50-3/16 56-3/16 62-3/16 34-3/16 36 32
06 62-3/16 68-3/16 74-3/16 46-3/16 48 44
08 68-3/16 74-3/16 80-3/16 52-3/16 54 50
10 76-3/16 82-3/16 88-3/16 60-3/16 62 58
12 86-3/16 92-3/16 98-3/16 70-3/16 72 68
Notes:

1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes


Inlet grill optional


Unit shown with left hand piping connections and right hand electrical connections as standard


Right hand piping connections with left hand electrical connections available as an option


Piping hand determined when facing the air outlet

All listed dimensions are approximate and are subject to change without notice
 Modifications to the product specifications must be accepted by Zehnder at its base office
 See www.zehnder-rittling.com for any recent updates or changes
Dimensions and data
DIMENSIONS AND DATA
Notes:
1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes
Inlet grille optional
Unit shown with left hand piping connections and right hand electrical connections as standard
Right hand piping connections with left hand electrical connections available as an option
Piping hand determined when facing the air outlet
All listed dimensions are approximate and are subject to change without notice
Modifications to the product specifications must be accepted by Zehnder Rittling at its base office
See www.zehnder-rittling.com for any recent updates or changes
Dimensional data
Unit size AB C D
Std. 6" Ext. 6" Ext. x2
02 38-3/16 44-3/16 50-3/16 22-3/16 24 20
03 44-3/16 50-3/16 56-3/16 28-3/16 30 26
04 50-3/16 56-3/16 62-3/16 34-3/16 36 32
06 62-3/16 68-3/16 74-3/16 46-3/16 48 44
08 68-3/16 74-3/16 80-3/16 52-3/16 54 50
10 76-3/16 82-3/16 88-3/16 60-3/16 62 58
12 86-3/16 92-3/16 98-3/16 70-3/16 72 68
Models RF and RFI

Revised June 1, 2018. Zehnder Rittling periodically makes changes to the design and/or specifications of its products. As a result, the design and specifications of each product at the time of order may be different than as
described herein. Please contact Zehnder Rittling's Sales Support staff at 716-827-6510 for specific information on current design and specifications. Designs, specifications and other information contained herein are not express
warranties, which are only as expressly set forth by Zehnder Rittling in its terms and conditions of sale. The latest version of this document is available at www.zehnder-rittling.com.
Rittling Cabinet Unit Heater
Submittal Data
Zehnder Rittling · 100 Rittling Blvd. · Buffalo, NY USA 14220
T 716-827-6510 · F 716-218-2805 · [e-mail] · www.zehnder-rittling.com
© Zehnder Rittling June 2018, English, subject to change without notice
M
K
7 1/8"
2"
16 1/8"
J
L
20 13/16"
8 1/8"
2"
T
P
N
R
12 13/16"
7 1/8"
6 1/2"
16"
1 row hot
water supply
steam supply
and 1 row
steam return
and 1 row
2, 3 & 4 row hot
water return
Side view: Model RS
position
Filter
1 row hot
water return
2, 3 & 4 row hot
water supply
Front view
(Front outlet)
3 1/2"
29 1/4"
A
Models RS and RSI
Dimensions and data
Dimensional data
Coil J K L M NP R T
2 Row 18-1/4 4-7/16 19-1/16 5-3/16 9-7/8 5-3/16 10-11/16 4-7/16
3 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
4 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
* Add 6" per extended end selection. See chart for details.
water return
2, 3 & 4 row hot
1 row hot
steam supply
water supply
2, 3 & 4 row hot
Side view: Model RSI
steam return
and 1 row
water supply
1 row hot
water return
and 1 row
Filter position
(top outlet)
access section
Top view
Fan speed
section
Piping access
Outlet opening centered
6"
D
10"
mounting slot
3/8" wd. x 1" lg.
(4 places)
Note: Inlet grille optional
Electrical
end pocket
Front view
(less front panel)
* 8" B * 8"
C
M
K
7 1/8"
2"
16 1/8"
J
L
20 13/16"
8 1/8"
2"
T
P
N
R
12 13/16"
7 1/8"
6 1/2"
16"
1 row hot
water supply
steam supply
and 1 row
steam return
and 1 row
2, 3 & 4 row hot
water return
Side view: Model RS
position
Filter
1 row hot
water return
2, 3 & 4 row hot
water supply
Front view
(Front outlet)
3 1/2"
29 1/4"
A
Models RS and RSI
Dimensions and data
Dimensional data
Coil J K L M NP R T
2 Row 18-1/4 4-7/16 19-1/16 5-3/16 9-7/8 5-3/16 10-11/16 4-7/16
3 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
4 Row 19-1/16 3-1/16 20-3/8 4-13/16 8-9/16 4-13/16 9-7/8 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
* Add 6" per extended end selection. See chart for details.
water return
2, 3 & 4 row hot
1 row hot
steam supply
water supply
2, 3 & 4 row hot
Side view: Model RSI
steam return
and 1 row
water supply
1 row hot
water return
and 1 row
Filter position
(top outlet)
access section
Top view
Fan speed
section
Piping access
Outlet opening centered
6"
D
10"
mounting slot
3/8" wd. x 1" lg.
(4 places)
Note: Inlet grille optional
Electrical
end pocket
Front view
(less front panel)
* 8" B * 8"
C
Dimensions and data Models RS and RSI
Dimensional data
Unit size AB C D
Std. 6" Ext. 6" Ext. x2
02 38-3/16 44-3/16 50-3/16 22-3/16 24 20
03 44-3/16 50-3/16 56-3/16 28-3/16 30 26
04 50-3/16 56-3/16 62-3/16 34-3/16 36 32
06 62-3/16 68-3/16 74-3/16 46-3/16 48 44
08 68-3/16 74-3/16 80-3/16 52-3/16 54 50
10 76-3/16 82-3/16 88-3/16 60-3/16 62 58
12 86-3/16 92-3/16 98-3/16 70-3/16 72 68
Notes:
1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes
 Inlet grill optional
 Unit shown with left hand piping connections and right hand electrical connections as standard
 Right hand piping connections with left hand electrical connections available as an option
 Piping hand determined when facing the air outlet
 All listed dimensions are approximate and are subject to change without notice
 Modifications to the product specifications must be accepted by Zehnder at its base office
 See www.zehnder-rittling.com for any recent updates or changes
RS-200
shown
Dimensions and data
Notes:
1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes
 Inlet grille optional
 Unit shown with left hand piping connections and right hand electrical connections as standard
 Right hand piping connections with left hand electrical connections available as an option
 Piping hand determined when facing the air outlet
 All listed dimensions are approximate and are subject to change without notice
 Modifications to the product specifications must be accepted by Zehnder Rittling at its base office
 See www.zehnder-rittling.com for any recent updates or changes
Dimensional data
Unit size AB C D
Std. 6" Ext. 6" Ext. x2
02 38-3/16 44-3/16 50-3/16 22-3/16 24 20
03 44-3/16 50-3/16 56-3/16 28-3/16 30 26
04 50-3/16 56-3/16 62-3/16 34-3/16 36 32
06 62-3/16 68-3/16 74-3/16 46-3/16 48 44
08 68-3/16 74-3/16 80-3/16 52-3/16 54 50
10 76-3/16 82-3/16 88-3/16 60-3/16 62 58
12 86-3/16 92-3/16 98-3/16 70-3/16 72 68
7
Models RS and RSI
RS-200
shown

Revised June 1, 2018. Zehnder Rittling periodically makes changes to the design and/or specifications of its products. As a result, the design and specifications of each product at the time of order may be different than as
described herein. Please contact Zehnder Rittling's Sales Support staff at 716-827-6510 for specific information on current design and specifications. Designs, specifications and other information contained herein are not express
warranties, which are only as expressly set forth by Zehnder Rittling in its terms and conditions of sale. The latest version of this document is available at www.zehnder-rittling.com.
Rittling Cabinet Unit Heater
Submittal Data
Zehnder Rittling · 100 Rittling Blvd. · Buffalo, NY USA 14220
T 716-827-6510 · F 716-218-2805 · [e-mail] · www.zehnder-rittling.com
© Zehnder Rittling June 2018, English, subject to change without notice
4"
16"
M
K
7 1/8"
2"
J
L
18 3/8"
13 5/8"
2"
T
P
N
R
7 1/8"
5 5/8"
10 3/8"
3/8" wd. x 1" lg.
(4 places)
mounting slot
Electrical
end pocket
Front view
(less front panel)
C
* 8" B * 8"
(top outlet)
Piping access
Top view
section
Outlet opening centered
Fan speed
access section
6"
D
10"
RW-280
shown
Models RW, RWI and RC
Dimensions and data
Dimensional data
Coil J K L M NPRT
2 Row 15-3/4 4-7/16 16-9/16 5-3/16 7-7/16 5-3/16 8-1/4 4-7/16
3 Row 16-9/16 3-1/16 17-1/8 4-13/16 6-1/8 4-13/16 7-7/16 3-1/16
4 Row 16-9/16 3-1/16 17-1/8 4-13/16 6-1/8 4-13/16 7-7/16 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
* Add 6" per extended end selection. See chart for details.
RC-360
shown
1 row hot
water supply
Filter
positions
and 1 row
steam supply
and 1 row
steam return
Side view: Model RW and RC
2, 3 & 4 row hot
water return
1 row hot
water return
2, 3 & 4 row hot
water supply
2, 3 & 4 row hot
water supply
water return
1 row hot
and 1 row
water return
Side view: Model RWI
steam supply
steam return
and 1 row
water supply
2, 3 & 4 row hot
1 row hot
Filter positions
Front view
(Front outlet)
6"
24"
A 3"
2 3/8"
6"
4"
16"
M
K
7 1/8"
2"
J
L
18 3/8"
13 5/8"
2"
T
P
N
R
7 1/8"
5 5/8"
10 3/8"
3/8" wd. x 1" lg.
(4 places)
mounting slot
Electrical
end pocket
Front view
(less front panel)
C
* 8" B * 8"
(top outlet)
Piping access
Top view
section
Outlet opening centered
Fan speed
access section
6"
D
10"
RW-280
shown
Models RW, RWI and RC
Dimensions and data
Dimensional data
Coil J K L M NPRT
2 Row 15-3/4 4-7/16 16-9/16 5-3/16 7-7/16 5-3/16 8-1/4 4-7/16
3 Row 16-9/16 3-1/16 17-1/8 4-13/16 6-1/8 4-13/16 7-7/16 3-1/16
4 Row 16-9/16 3-1/16 17-1/8 4-13/16 6-1/8 4-13/16 7-7/16 3-1/16
Notes:
- 1, 2, 3 and 4 row coil supply and return 1/2" nominal (5/8" OD) all sizes.
- Left hand piping connections shown, right hand electrical as standard.
Piping hand determined when facing the air outlet.
- Unit length: for 6" extended end pocket add 6" to dimension "A".
- All listed dimensions are approximate and are subject to change without
notice. Modifications to the product specificstions must be acceptrd by
Zehnder at its base office.
Dimensional data
Unit size AB CD
Std. 6" Ext
02 38-3/16 44-3/16 22-3/16 23-5/8 20
03 44-3/16 50-3/16 28-3/16 29-5/8 26
04 50-3/16 56-3/16 34-3/16 35-5/8 32
06 62-3/16 68-3/16 46-3/16 47-5/8 44
08 68-3/16 74-3/16 52-3/16 53-5/8 50
10 76-3/16 82-3/16 60-3/16 61-5/8 58
12 86-3/16 92-3/16 70-3/16 71-5/8 68
* Add 6" per extended end selection. See chart for details.
RC-360
shown
1 row hot
water supply
Filter
positions
and 1 row
steam supply
and 1 row
steam return
Side view: Model RW and RC
2, 3 & 4 row hot
water return
1 row hot
water return
2, 3 & 4 row hot
water supply
2, 3 & 4 row hot
water supply
water return
1 row hot
and 1 row
water return
Side view: Model RWI
steam supply
steam return
and 1 row
water supply
2, 3 & 4 row hot
1 row hot
Filter positions
Front view
(Front outlet)
6"
24"
A 3"
2 3/8"
6"
Dimensions and data Model RW, RWI and RC
Notes:
1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes
 Inlet grill optional
 Unit shown with left hand piping connections and right hand electrical connections as standard
 Right hand piping connections with left hand electrical connections available as an option
 Piping hand determined when facing the air outlet
 All listed dimensions are approximate and are subject to change without notice
 Modifications to the product specifications must be accepted by Zehnder at its base office
 See www.zehnder-rittling.com for any recent updates or changes
Dimensional data
Unit size
AB C Louvers Ducted opening
Std. 6" Ext. 6" Ext. x2 D E F G
02
38-3/16 44-3/16 50-3/16 22-3/16 24 20 618-3/8 5-1/8
03
44-3/16 50-3/16 56-3/16 28-3/16 30 26 624-3/16 5-1/8
04
50-3/16 56-3/16 62-3/16 34-3/16 36 32 630-3/16 5-1/8
06
62-3/16 68-3/16 74-3/16 46-3/16 48 44 642-3/16 5-1/8
08
68-3/16 74-3/16 80-3/16 52-3/16 54 50 648-3/16 5-1/8
10
76-3/16 82-3/16 88-3/16 60-3/16 62 58 656-3/16 5-1/8
12
86-3/16 92-3/16 98-3/16 70-3/16 72 68 666-3/16 5-1/8
Notes:
1 and 2 row coil supply and return 1/2" nominal (5/8" OD) all sizes
 Inlet grille optional
 Unit shown with left hand piping connections and right hand electrical connections as standard
 Right hand piping connections with left hand electrical connections available as an option
 Piping hand determined when facing the air outlet
 All listed dimensions are approximate and are subject to change without notice
 Modifications to the product specifications must be accepted by Zehnder Rittling at its base office
 See www.zehnder-rittling.com for any recent updates or changes
Dimensions and data
Dimensional data
Unit size AB C Louvers Ducted opening
Std. 6" Ext. 6" Ext. x2 D E F G
02 38-3/16 44-3/16 50-3/16 22-3/16 24 20 618-3/8 5-1/8
03 44-3/16 50-3/16 56-3/16 28-3/16 30 26 624-3/16 5-1/8
04 50-3/16 56-3/16 62-3/16 34-3/16 36 32 630-3/16 5-1/8
06 62-3/16 68-3/16 74-3/16 46-3/16 48 44 642-3/16 5-1/8
08 68-3/16 74-3/16 80-3/16 52-3/16 54 50 648-3/16 5-1/8
10 76-3/16 82-3/16 88-3/16 60-3/16 62 58 656-3/16 5-1/8
12 86-3/16 92-3/16 98-3/16 70-3/16 72 68 666-3/16 5-1/8
DIMENSIONS AND DATA
8
Models RW, RWI and RC