Roda RF-DT-20-02-L-M, RF-DT-30-02-L-M, RF-DT-35-02-L-M, RF-DT-45-02-L-M, RF-DT-55-02-L-M User guide

FAN COIL DUCT TYPE

ENGINEERING

INSTALLATION AND OPERATION MANUAL

RF-DT-20-02-L-M
RF-DT-30-02-L-M
RF-DT-35-02-L-M
RF-DT-45-02-L-M
RF-DT-55-02-L-M
RF-DT-70-02-L-M
RF-DT-90-02-L-M
RF-DT-110-02-L-M

CONTENTS PAGE

TECHNICAL CHARACTERISTICS UNIT STANDARD
SPECIFICATION
COIL DATA
COOLING PERFORMANCE
HEATING PERFORMANCE
THERMOSTAT
THREE-WAY MOTORIZED VALVES
DIMENSIONS
INSTALLATION
MAINTENANCE

3
5
6
6
9
13
15
17
18
19

TECHNICAL CHARACTERISTICS UNIT STANDARD

BEARING STRUCTURE

Bearing structure made of large thickness galvanized sheet-steel with holes for fixing to wall/ceiling + Thermal­acoustic internal insulation

CABINET

Cabinet made of thick steel-sheet to make it resistant to rust, corrosion, chemical agents, solvents, aliphatic and
alcohols. The cabinet is with thermo acoustic internal insulation and holes to hang unit.

AIR DELIVERY GRILL

Air delivery grill by fixed finis, adjustable on two positions (air flow can be reversed by rotating grill by 180°). Made of
gray ABS (similar to RAL7035), supplied with small side doors for easy access to control planet.

HEAT EXCHANGER

Highly efficient coil which copper pipes and aluminum fins fixed by mechanical expansion. Coil connections provided
with anti torsion system, hand air vent valves, hand water drain valves.
Coils tested at the pressure of 30 bar, intended to work with water at 15 bar pressure.

FAN SECTION

Fan section including 1 or 2 centrifugals fans with double air inlet metal blades (forward curved fins) directly coupled to
the electric motor. Fan section statically and dynamically balanced. Extensive diameter fans (= high air flow and high
static pressure) and few revolutions (= low noise level). Electric motor has
3 speeds, provided with heat protection (Xlixon), running capacitor permanently switched on, Class B, electric cables
protected by double insulation. Fan section is easy to remove.

AIR FILTER

Air filter easy to remove, made of a metal frame holding filtering section which can be regenerated by water wash,
blowing, suction.

DRAIN PAN

Drain pan with drain pipe Ø 21mm (standard on the same side of coil connections) and heat insulation

SWITCHBOARD

The unit is supplied equipped with connection terminal board for the ventilation speeds.

.3.

.4.

RF - DT SERIES SPECIFICATIONS:

RF- -20-02-L-MDT RF- -30-02-L-MDT RF- -35-02-L-MDT RF- -45-02-L-MDT RF- -55-02-L-MDT RF- -70-02-L-MDT RF- -90-02-L-MDT

RF- -110-02-L-MDT

.5.

RF- -20-02-L-MDT

COIL DATA (2 PIPE 3 ROW)

RF- -30-02-L-MDT
RF- -35-02-L-MDT
RF- -45-02-L-MDT
RF- -55-02-L-MDT
RF- -70-02-L-MDT
RF- -90-02-L-MDT
RF- -110-02-L-MDT

COOLING PERFORMANCE (2 PIPE 3 ROWS)

RF- -30-02-L-MDT

.6.

RF- -35-02-L-MDT

RF- -45-02-L-MDT

RF- -55-02-L-MDT

.7.

RF- -70-02-L-MDT

RF- -90-02-L-MDT

RF- -90-02-L-MDT

.8.

RF- -20-02-L-MDT

HEATING PERFORMANCE (2 PIPE 3 ROWS)

RF- -30-02-L-MDT

.9.

RF- -35-02-L-MDT

RF- -45-02-L-MDT

.10.

RF- -55-02-L-MDT

RF- -70-02-L-MDT

.11.

RF- -90-02-L-MDT

RF- -110-02-L-MDT

.12.

THERMOSTAT

.13.

.14.

HR-G3 SERIES THREE-WAY MOTORIZED VALVES

.15.

.16.

DIMENSIONS

598

720

10 10

10

4-ф13

540

50

390

240

RF- -20-02-L-MDT

2- "Rp3/4

ф25

495

2- 1 2"Rp /

200

240

40

A

C

10 10

4-ф13

MODEL

B

-30- -35- -45- -55- -70- -90- -110-

648

590

770

798

740

920

Rp3/4"

Rp1/2"

A

B

C

Rp3/4"

D

Rp1/2"

d

948

890

1070

Rp3/4"

Rp1/2"

998

940

1120

Rp3/4"

Rp1/2"

50

390

Rp3/4"

Rp1/2"

1348

1290

1470

240

1498

1440

1620

Rp3/4"

Rp1/2"

2-D 2-d

495

1798

1740

1920

Rp3/4"

Rp1/2"

ф25

200

240

40

.17.

INSTALLATION

1) LOCATION

Before installation and running the unit, please check the following:
I. There must be enough space for the unit installation and maintenance. Please refer to Figure 1 for the unit's
outlines and dimensions and Figure 2 for the minimum distance between the unit and the obstacle.
ii. Please ensure enough space for piping connection and electrical wiring.
iii. Check whether the hanging rods can support weight of the unit (see specification table for weight of the unit).
iv. The unit must be installed horizontally to ensure proper operation and condensate draining.
v. The external static pressure of the ducting must be within the design static pressure range.
vi. Confirm that the unit has been switched OFF before installing or servicing the unit.

2) UNIT INSTALLATION

I. The unit is designed to be installed in a concealed ceiling. Installation and maintenance should be performed by
qualified persons who are familiar with local codes and regulations, and experienced with this type of appliance.
ii. Please refer to picture below illustrates the installation procedure.

CAUTION:

Make sure the top of the unit is level after installation. The drain pan is designed with a little gradient to facilitate
drainage.

4) PIPE CONNECTIONS

Make sure the diameter of the water pipes is adequate for the actual length of the piping and in any case not less
than the diameter of the connection on the unit. When connecting the water pipes to the coil, take care not to
damage the coil manifold. During this operation, hold the coil connections firm with a spanner to avoid damaging
them.
The fittings are located on the back of the unit looking at the air outlets.

CONNECTING THE WATER PIPING

This operation must be carried out with particular care. The unit is fitted with a gravity drainage condensate drain
pan with an open connection on the back of the unit. The pipe should have an internal diameter of at least 16 mm.
The drain connection has an external diameter of 18 mm.
Proceed according to the following instructions (see figure).

1. Connect the condensate drain hose to the pan outlet with a hose clip.

2. Make sure the drain pipe has a slope of at least 2 cm/m without obstructions or bottlenecks.

3. Fit a siphon. By eliminating the pressure drop caused by the fan, this prevents air being sucked up by the drain
hose.

4. Connect the condensate drain pipe to a rainwater drainage system. Do not connect to the sewage system as
odors may be sucked up if the water in the siphon evaporates.

5. After connecting, check correct drainage of the condensate by pouring water into the pan.

.18.

MAINTENANCE

GENERAL

1. Installation and maintenance should be performed by qualified persons who are familiar with local codes
and regulations, and experienced with this type of appliance.

2. Confirm that the unit has been switched OFF before installing or servicing the unit.

3. A good general maintenance plan will avoid losses and unexpected shutting down of the equipment.

4. Dirty filters reduce air flow as well as unit performance. Thus changing or cleaning the filters is very important.
Check the cleanliness of filter and replace or clean as required monthly.

5. Coils should be cleaned from dust, dirt or lint with compressed air or water. They can be brushed with a soft
brush and vacuum cleaner.

6. Water coil not used during winter season should be drained, or anti-freezing solution should be added to the
water circuit to avoid freezing.

7. Monthly:

a. Inspect and clean condensate drain pan to avoiding clogging of drainage by dirt, dust, etc. Inspect drainage

piping to ensure the proper condensate flow.

b. Check and clean the coil. Clean the coils with low pressure water jet or low pressure air.
c. Clean and tighten all the wiring connections.
d. Drain out the system water and check for build up of mineral deposits.

FILTER CLEANING

1. Loosen the screws and remove the filter from the bottom.

2. Clean the filter with a brush, or with water.

3. Put back the filter by sliding it back into the groove.

4. Re-tighten the filter side plate with screws.

.19.